diff --git a/src/Clima.Api/Clima.Api.csproj b/src/Clima.Api/Clima.Api.csproj
index 7e496b4..db81373 100644
--- a/src/Clima.Api/Clima.Api.csproj
+++ b/src/Clima.Api/Clima.Api.csproj
@@ -1,9 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>b004094a-ecbf-4bb4-aa67-af634a6090d9</UserSecretsId>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Clima.Api/Controllers/WeatherController.cs b/src/Clima.Api/Controllers/WeatherController.cs
new file mode 100644
index 0000000..086b3c7
--- /dev/null
+++ b/src/Clima.Api/Controllers/WeatherController.cs
@@ -0,0 +1,55 @@
+using Clima.Core.Entities;
+using Clima.Infrastructure.Persistence.Repositories;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Clima.Api.Controllers
+{
+  /// <summary>
+  /// Provee endpoints para acceder a los datos del pronóstico del tiempo.
+  /// </summary>
+  [ApiController]
+  [Route("api/[controller]")]
+  public class WeatherController : ControllerBase
+  {
+    private readonly IPronosticoRepository _pronosticoRepository;
+    private readonly ILogger<WeatherController> _logger;
+
+    public WeatherController(
+        IPronosticoRepository pronosticoRepository,
+        ILogger<WeatherController> logger)
+    {
+      _pronosticoRepository = pronosticoRepository;
+      _logger = logger;
+    }
+
+    /// <summary>
+    /// Obtiene el pronóstico de 5 días para una estación meteorológica específica.
+    /// </summary>
+    /// <param name="nombreEstacion">El nombre de la estación (ej. "LA_PLATA_AERO").</param>
+    /// <returns>Una lista de pronósticos ordenados por fecha.</returns>
+    [HttpGet("{nombreEstacion}")]
+    [ProducesResponseType(typeof(IEnumerable<Pronostico>), StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    [ProducesResponseType(StatusCodes.Status500InternalServerError)]
+    public async Task<IActionResult> GetForecastByStation(string nombreEstacion)
+    {
+      try
+      {
+        var pronosticos = await _pronosticoRepository.ObtenerPorEstacionAsync(nombreEstacion);
+
+        if (pronosticos == null || !pronosticos.Any())
+        {
+          _logger.LogWarning("No se encontraron datos de pronóstico para la estación: {Estacion}", nombreEstacion);
+          return NotFound($"No se encontraron datos para la estación: {nombreEstacion}");
+        }
+
+        return Ok(pronosticos);
+      }
+      catch (Exception ex)
+      {
+        _logger.LogError(ex, "Error al obtener el pronóstico para la estación: {Estacion}", nombreEstacion);
+        return StatusCode(StatusCodes.Status500InternalServerError, "Ocurrió un error interno al procesar la solicitud.");
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/Clima.Api/Program.cs b/src/Clima.Api/Program.cs
index ee9d65d..805c31f 100644
--- a/src/Clima.Api/Program.cs
+++ b/src/Clima.Api/Program.cs
@@ -1,41 +1,50 @@
+using Clima.Database.Migrations;
+using Clima.Infrastructure.Persistence;
+using Clima.Infrastructure.Persistence.Repositories;
+using FluentMigrator.Runner;
+
 var builder = WebApplication.CreateBuilder(args);
 
-// Add services to the container.
-// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
-builder.Services.AddOpenApi();
+// --- Registro de Servicios ---
+
+// 1. Fábrica de Conexiones
+builder.Services.AddSingleton<IDbConnectionFactory, SqlConnectionFactory>();
+
+// 2. Repositorio
+builder.Services.AddScoped<IPronosticoRepository, PronosticoRepository>();
+
+// 3. FluentMigrator para la gestión de la base de datos
+builder.Services
+    .AddFluentMigratorCore()
+    .ConfigureRunner(rb => rb
+        .AddSqlServer()
+        .WithGlobalConnectionString(builder.Configuration.GetConnectionString("DefaultConnection"))
+        .ScanIn(typeof(CreatePronosticoTable).Assembly).For.Migrations())
+    .AddLogging(lb => lb.AddFluentMigratorConsole());
+
+// 4. Servicios estándar de la API
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
 
 var app = builder.Build();
 
-// Configure the HTTP request pipeline.
+// --- Pipeline de Ejecución ---
+
+// Ejecutar migraciones al inicio para crear/actualizar la base de datos
+using (var scope = app.Services.CreateScope())
+{
+    var migrationRunner = scope.ServiceProvider.GetRequiredService<IMigrationRunner>();
+    migrationRunner.MigrateUp();
+}
+
 if (app.Environment.IsDevelopment())
 {
-    app.MapOpenApi();
+    app.UseSwagger();
+    app.UseSwaggerUI();
 }
 
 app.UseHttpsRedirection();
-
-var summaries = new[]
-{
-    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
-};
-
-app.MapGet("/weatherforecast", () =>
-{
-    var forecast =  Enumerable.Range(1, 5).Select(index =>
-        new WeatherForecast
-        (
-            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
-            Random.Shared.Next(-20, 55),
-            summaries[Random.Shared.Next(summaries.Length)]
-        ))
-        .ToArray();
-    return forecast;
-})
-.WithName("GetWeatherForecast");
-
-app.Run();
-
-record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
-{
-    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
-}
+app.UseAuthorization();
+app.MapControllers();
+app.Run();
\ No newline at end of file
diff --git a/src/Clima.Api/appsettings.json b/src/Clima.Api/appsettings.json
index 10f68b8..4203181 100644
--- a/src/Clima.Api/appsettings.json
+++ b/src/Clima.Api/appsettings.json
@@ -5,5 +5,8 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
+  "ConnectionStrings": {
+    "DefaultConnection": ""
+  },
   "AllowedHosts": "*"
 }
diff --git a/src/Clima.Core/Entities/Pronostico.cs b/src/Clima.Core/Entities/Pronostico.cs
index 15c9f8c..a3ce5ea 100644
--- a/src/Clima.Core/Entities/Pronostico.cs
+++ b/src/Clima.Core/Entities/Pronostico.cs
@@ -1,13 +1,13 @@
 namespace Clima.Core.Entities
 {
-    public class Pronostico
-    {
-        public long Id { get; set; }
-        public string Estacion { get; set; } = string.Empty;
-        public DateTime FechaHora { get; set; }
-        public decimal TemperaturaC { get; set; }
-        public int VientoDirGrados { get; set; }
-        public int VientoKmh { get; set; }
-        public decimal PrecipitacionMm { get; set; }
-    }
+  public class Pronostico
+  {
+    public long Id { get; set; }
+    public string Estacion { get; set; } = string.Empty;
+    public DateTime FechaHora { get; set; }
+    public decimal TemperaturaC { get; set; }
+    public int VientoDirGrados { get; set; }
+    public int VientoKmh { get; set; }
+    public decimal PrecipitacionMm { get; set; }
+  }
 }
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/DataFetchers/IDataFetcher.cs b/src/Clima.Infrastructure/DataFetchers/IDataFetcher.cs
new file mode 100644
index 0000000..412fcc1
--- /dev/null
+++ b/src/Clima.Infrastructure/DataFetchers/IDataFetcher.cs
@@ -0,0 +1,8 @@
+namespace Clima.Infrastructure.DataFetchers
+{
+  public interface IDataFetcher
+  {
+    string SourceName { get; }
+    Task<(bool Success, string Message)> FetchDataAsync();
+  }
+}
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/DataFetchers/SmnEtlFetcher.cs b/src/Clima.Infrastructure/DataFetchers/SmnEtlFetcher.cs
new file mode 100644
index 0000000..41b8dec
--- /dev/null
+++ b/src/Clima.Infrastructure/DataFetchers/SmnEtlFetcher.cs
@@ -0,0 +1,179 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Clima.Core.Entities;
+using Clima.Infrastructure.Persistence.Repositories;
+using Microsoft.Extensions.Logging;
+
+namespace Clima.Infrastructure.DataFetchers
+{
+  /// <summary>
+  /// Realiza el proceso ETL completo para los datos de pronóstico de 5 días del SMN.
+  /// </summary>
+  public class SmnEtlFetcher : IDataFetcher
+  {
+    public string SourceName => "SMN_Forecast_5_Days";
+    private const string DataUrl = "https://ssl.smn.gob.ar/dpd/zipopendata.php?dato=pron5d";
+
+    private readonly IHttpClientFactory _httpClientFactory;
+    private readonly IPronosticoRepository _pronosticoRepository;
+    private readonly ILogger<SmnEtlFetcher> _logger;
+
+    public SmnEtlFetcher(
+        IHttpClientFactory httpClientFactory,
+        IPronosticoRepository pronosticoRepository,
+        ILogger<SmnEtlFetcher> logger)
+    {
+      _httpClientFactory = httpClientFactory;
+      _pronosticoRepository = pronosticoRepository;
+      _logger = logger;
+    }
+
+    public async Task<(bool Success, string Message)> FetchDataAsync()
+    {
+      _logger.LogInformation("Iniciando proceso ETL para {SourceName}.", SourceName);
+      try
+      {
+        // 1. EXTRACCIÓN (E)
+        _logger.LogInformation("Descargando archivo ZIP desde la fuente de datos...");
+        var zipBytes = await DownloadZipFileAsync();
+        if (zipBytes == null || zipBytes.Length == 0)
+        {
+          return (false, "La descarga del archivo ZIP falló o el archivo está vacío.");
+        }
+
+        // 2. TRANSFORMACIÓN (T)
+        _logger.LogInformation("Parseando los datos del pronóstico desde el archivo de texto...");
+        var pronosticosPorEstacion = ParseTxtContent(zipBytes);
+        if (!pronosticosPorEstacion.Any())
+        {
+          return (true, "Proceso completado, pero no se encontraron datos de pronóstico válidos para procesar.");
+        }
+
+        // 3. CARGA (L)
+        _logger.LogInformation("Actualizando la base de datos con {Count} estaciones.", pronosticosPorEstacion.Count);
+        foreach (var kvp in pronosticosPorEstacion)
+        {
+          var estacion = kvp.Key;
+          var pronosticos = kvp.Value;
+          await _pronosticoRepository.ReemplazarPronosticosPorEstacionAsync(estacion, pronosticos);
+          _logger.LogInformation("Datos para la estación '{Estacion}' actualizados ({Count} registros).", estacion, pronosticos.Count);
+        }
+
+        return (true, $"Proceso ETL completado exitosamente. Se procesaron {pronosticosPorEstacion.Count} estaciones.");
+      }
+      catch (Exception ex)
+      {
+        _logger.LogCritical(ex, "Falló el proceso ETL para {SourceName}.", SourceName);
+        return (false, $"Error crítico: {ex.Message}");
+      }
+    }
+
+    private async Task<byte[]> DownloadZipFileAsync()
+    {
+      var client = _httpClientFactory.CreateClient("SmnApiClient");
+      return await client.GetByteArrayAsync(DataUrl);
+    }
+
+    private Dictionary<string, List<Pronostico>> ParseTxtContent(byte[] zipBytes)
+    {
+      var pronosticosAgrupados = new Dictionary<string, List<Pronostico>>();
+
+      using var memoryStream = new MemoryStream(zipBytes);
+      using var archive = new ZipArchive(memoryStream, ZipArchiveMode.Read);
+
+      // Buscamos el primer archivo .txt dentro del ZIP
+      var txtEntry = archive.Entries.FirstOrDefault(e => e.Name.EndsWith(".txt", StringComparison.OrdinalIgnoreCase));
+      if (txtEntry == null)
+      {
+        _logger.LogWarning("No se encontró un archivo .txt dentro del ZIP descargado.");
+        return pronosticosAgrupados;
+      }
+
+      using var stream = txtEntry.Open();
+      using var reader = new StreamReader(stream);
+
+      string? currentStation = null;
+      List<Pronostico> currentForecasts = new List<Pronostico>();
+
+      string? line;
+      while ((line = reader.ReadLine()) != null)
+      {
+        // Si la línea es la de separación, y estábamos procesando una estación, la guardamos.
+        if (line.Trim().StartsWith("===="))
+        {
+          if (currentStation != null && currentForecasts.Any())
+          {
+            pronosticosAgrupados[currentStation] = new List<Pronostico>(currentForecasts);
+            _logger.LogDebug("Estación '{Station}' parseada con {Count} registros.", currentStation, currentForecasts.Count);
+          }
+          currentStation = null;
+          currentForecasts.Clear();
+          continue;
+        }
+
+        // Si no estamos en una estación, buscamos la siguiente
+        if (currentStation == null)
+        {
+          // Una línea de nombre de estación no empieza con espacio
+          if (!string.IsNullOrWhiteSpace(line) && char.IsLetter(line[0]))
+          {
+            currentStation = line.Trim();
+          }
+          continue;
+        }
+
+        // Si estamos dentro de una estación, intentamos parsear la línea de datos
+        try
+        {
+          // Saltamos líneas vacías o de cabecera
+          if (string.IsNullOrWhiteSpace(line) || !char.IsDigit(line.Trim()[0])) continue;
+
+          var pronostico = ParseForecastLine(currentStation, line);
+          currentForecasts.Add(pronostico);
+        }
+        catch (Exception ex)
+        {
+          _logger.LogWarning(ex, "Se omitió una línea de pronóstico inválida para la estación '{Station}': '{Line}'", currentStation, line);
+        }
+      }
+
+      return pronosticosAgrupados;
+    }
+
+    private Pronostico ParseForecastLine(string station, string line)
+    {
+      // Parseo de fecha y hora. Ej: "25/JUL/2025 00Hs."
+      var fullDateString = line.Substring(2, 18).Trim();
+      var datePart = fullDateString.Substring(0, 11);
+      var hourPart = fullDateString.Substring(12, 2);
+      // Creamos un string de fecha compatible: "25/JUL/2025 00"
+      var parsableDateString = $"{datePart} {hourPart}";
+      // Usamos CultureInfo para que entienda "JUL" en español
+      var culture = new CultureInfo("es-AR");
+      var fechaHora = DateTime.ParseExact(parsableDateString, "dd/MMM/yyyy HH", culture);
+
+      // Parseo de valores numéricos de ancho fijo
+      var temperatura = decimal.Parse(line.Substring(28, 10).Trim(), CultureInfo.InvariantCulture);
+      var vientoData = line.Substring(41, 12).Split('|', StringSplitOptions.TrimEntries);
+      var vientoDir = int.Parse(vientoData[0]);
+      var vientoVel = int.Parse(vientoData[1]);
+      var precipitacion = decimal.Parse(line.Substring(59, 10).Trim(), CultureInfo.InvariantCulture);
+
+      return new Pronostico
+      {
+        Estacion = station,
+        FechaHora = fechaHora,
+        TemperaturaC = temperatura,
+        VientoDirGrados = vientoDir,
+        VientoKmh = vientoVel,
+        PrecipitacionMm = precipitacion
+      };
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/Persistence/IDbConnectionFactory.cs b/src/Clima.Infrastructure/Persistence/IDbConnectionFactory.cs
new file mode 100644
index 0000000..ebf235a
--- /dev/null
+++ b/src/Clima.Infrastructure/Persistence/IDbConnectionFactory.cs
@@ -0,0 +1,15 @@
+using System.Data;
+
+namespace Clima.Infrastructure.Persistence
+{
+    /// <summary>
+    /// Define una fábrica para crear conexiones a la base de datos.
+    /// </summary>
+    public interface IDbConnectionFactory
+    {
+        /// <summary>
+        /// Crea y devuelve una nueva instancia de IDbConnection.
+        /// </summary>
+        IDbConnection CreateConnection();
+    }
+}
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/Persistence/Repositories/IPronosticoRepository.cs b/src/Clima.Infrastructure/Persistence/Repositories/IPronosticoRepository.cs
index 72d67b0..02805b4 100644
--- a/src/Clima.Infrastructure/Persistence/Repositories/IPronosticoRepository.cs
+++ b/src/Clima.Infrastructure/Persistence/Repositories/IPronosticoRepository.cs
@@ -2,9 +2,9 @@ using Clima.Core.Entities;
 
 namespace Clima.Infrastructure.Persistence.Repositories
 {
-    public interface IPronosticoRepository
-    {
-        Task<IEnumerable<Pronostico>> ObtenerPorEstacionAsync(string nombreEstacion);
-        Task ReemplazarPronosticosPorEstacionAsync(string nombreEstacion, IEnumerable<Pronostico> pronosticos);
-    }
+  public interface IPronosticoRepository
+  {
+    Task<IEnumerable<Pronostico>> ObtenerPorEstacionAsync(string nombreEstacion);
+    Task ReemplazarPronosticosPorEstacionAsync(string nombreEstacion, IEnumerable<Pronostico> pronosticos);
+  }
 }
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/Persistence/Repositories/PronosticoRepository.cs b/src/Clima.Infrastructure/Persistence/Repositories/PronosticoRepository.cs
index 8ea1667..fbcfe25 100644
--- a/src/Clima.Infrastructure/Persistence/Repositories/PronosticoRepository.cs
+++ b/src/Clima.Infrastructure/Persistence/Repositories/PronosticoRepository.cs
@@ -5,44 +5,44 @@ using System.Data;
 
 namespace Clima.Infrastructure.Persistence.Repositories
 {
-    public class PronosticoRepository : IPronosticoRepository
+  public class PronosticoRepository : IPronosticoRepository
+  {
+    private readonly IDbConnectionFactory _dbConnectionFactory;
+
+    public PronosticoRepository(IDbConnectionFactory dbConnectionFactory)
     {
-        private readonly IDbConnectionFactory _dbConnectionFactory;
+      _dbConnectionFactory = dbConnectionFactory;
+    }
 
-        public PronosticoRepository(IDbConnectionFactory dbConnectionFactory)
-        {
-            _dbConnectionFactory = dbConnectionFactory;
-        }
+    public async Task<IEnumerable<Pronostico>> ObtenerPorEstacionAsync(string nombreEstacion)
+    {
+      using var connection = _dbConnectionFactory.CreateConnection();
+      const string sql = "SELECT * FROM Pronosticos WHERE Estacion = @NombreEstacion ORDER BY FechaHora ASC;";
+      return await connection.QueryAsync<Pronostico>(sql, new { NombreEstacion = nombreEstacion });
+    }
 
-        public async Task<IEnumerable<Pronostico>> ObtenerPorEstacionAsync(string nombreEstacion)
-        {
-            using var connection = _dbConnectionFactory.CreateConnection();
-            const string sql = "SELECT * FROM Pronosticos WHERE Estacion = @NombreEstacion ORDER BY FechaHora ASC;";
-            return await connection.QueryAsync<Pronostico>(sql, new { NombreEstacion = nombreEstacion });
-        }
+    public async Task ReemplazarPronosticosPorEstacionAsync(string nombreEstacion, IEnumerable<Pronostico> pronosticos)
+    {
+      using var connection = _dbConnectionFactory.CreateConnection();
+      connection.Open();
+      using var transaction = connection.BeginTransaction();
+      try
+      {
+        const string deleteSql = "DELETE FROM Pronosticos WHERE Estacion = @NombreEstacion;";
+        await connection.ExecuteAsync(deleteSql, new { NombreEstacion = nombreEstacion }, transaction);
 
-        public async Task ReemplazarPronosticosPorEstacionAsync(string nombreEstacion, IEnumerable<Pronostico> pronosticos)
-        {
-            using var connection = _dbConnectionFactory.CreateConnection();
-            connection.Open();
-            using var transaction = connection.BeginTransaction();
-            try
-            {
-                const string deleteSql = "DELETE FROM Pronosticos WHERE Estacion = @NombreEstacion;";
-                await connection.ExecuteAsync(deleteSql, new { NombreEstacion = nombreEstacion }, transaction);
-
-                const string insertSql = @"
+        const string insertSql = @"
                     INSERT INTO Pronosticos (Estacion, FechaHora, TemperaturaC, VientoDirGrados, VientoKmh, PrecipitacionMm)
                     VALUES (@Estacion, @FechaHora, @TemperaturaC, @VientoDirGrados, @VientoKmh, @PrecipitacionMm);";
-                await connection.ExecuteAsync(insertSql, pronosticos, transaction);
-                
-                transaction.Commit();
-            }
-            catch
-            {
-                transaction.Rollback();
-                throw;
-            }
-        }
+        await connection.ExecuteAsync(insertSql, pronosticos, transaction);
+
+        transaction.Commit();
+      }
+      catch
+      {
+        transaction.Rollback();
+        throw;
+      }
     }
+  }
 }
\ No newline at end of file
diff --git a/src/Clima.Infrastructure/Persistence/SqlConnectionFactory.cs b/src/Clima.Infrastructure/Persistence/SqlConnectionFactory.cs
new file mode 100644
index 0000000..6304e89
--- /dev/null
+++ b/src/Clima.Infrastructure/Persistence/SqlConnectionFactory.cs
@@ -0,0 +1,28 @@
+using Microsoft.Data.SqlClient;
+using Microsoft.Extensions.Configuration;
+using System.Data;
+
+namespace Clima.Infrastructure.Persistence
+{
+    /// <summary>
+    /// Implementación de IDbConnectionFactory para Microsoft SQL Server.
+    /// </summary>
+    public class SqlConnectionFactory : IDbConnectionFactory
+    {
+        private readonly string _connectionString;
+
+        public SqlConnectionFactory(IConfiguration configuration)
+        {
+            // Lee la cadena de conexión desde la configuración (appsettings.json, user secrets, etc.)
+            _connectionString = configuration.GetConnectionString("DefaultConnection")
+                ?? throw new InvalidOperationException("La cadena de conexión 'DefaultConnection' no fue encontrada en la configuración.");
+        }
+
+        public IDbConnection CreateConnection()
+        {
+            // Crea una nueva conexión de SQL Server.
+            // Dapper se encargará de abrirla y cerrarla automáticamente.
+            return new SqlConnection(_connectionString);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Clima.Worker/Program.cs b/src/Clima.Worker/Program.cs
index e96a966..99d7576 100644
--- a/src/Clima.Worker/Program.cs
+++ b/src/Clima.Worker/Program.cs
@@ -1,7 +1,43 @@
+using Clima.Infrastructure.DataFetchers;
+using Clima.Infrastructure.Persistence;
+using Clima.Infrastructure.Persistence.Repositories;
 using Clima.Worker;
+using Polly;
+using Polly.Extensions.Http;
 
-var builder = Host.CreateApplicationBuilder(args);
-builder.Services.AddHostedService<Worker>();
+IHost host = Host.CreateDefaultBuilder(args)
+    .ConfigureServices((hostContext, services) =>
+    {
+        IConfiguration configuration = hostContext.Configuration;
 
-var host = builder.Build();
-host.Run();
+        // --- Registro de Servicios ---
+
+        // 1. Infraestructura de Persistencia
+        services.AddSingleton<IDbConnectionFactory, SqlConnectionFactory>();
+        services.AddScoped<IPronosticoRepository, PronosticoRepository>();
+        
+        // 2. Fetcher de Datos
+        services.AddScoped<IDataFetcher, SmnEtlFetcher>();
+
+        // 3. Cliente HTTP con política de reintentos
+        services.AddHttpClient("SmnApiClient")
+            .AddPolicyHandler(GetRetryPolicy());
+
+        // 4. Servicio de Fondo principal
+        services.AddHostedService<SmnSyncService>();
+    })
+    .Build();
+
+/// <summary>
+/// Define una política de reintentos para las llamadas HTTP.
+/// Si una petición falla por un error transitorio, se reintentará hasta 3 veces
+/// con una espera exponencial entre cada intento.
+/// </summary>
+static IAsyncPolicy<HttpResponseMessage> GetRetryPolicy()
+{
+    return HttpPolicyExtensions
+        .HandleTransientHttpError() // Maneja errores de red comunes
+        .WaitAndRetryAsync(3, retryAttempt => TimeSpan.FromSeconds(Math.Pow(2, retryAttempt)));
+}
+
+await host.RunAsync();
\ No newline at end of file
diff --git a/src/Clima.Worker/SmnSyncService.cs b/src/Clima.Worker/SmnSyncService.cs
new file mode 100644
index 0000000..8ecb1d0
--- /dev/null
+++ b/src/Clima.Worker/SmnSyncService.cs
@@ -0,0 +1,53 @@
+using Clima.Infrastructure.DataFetchers;
+
+namespace Clima.Worker
+{
+  public class SmnSyncService : BackgroundService
+  {
+    private readonly ILogger<SmnSyncService> _logger;
+    private readonly IServiceProvider _serviceProvider;
+
+    public SmnSyncService(ILogger<SmnSyncService> logger, IServiceProvider serviceProvider)
+    {
+      _logger = logger;
+      _serviceProvider = serviceProvider;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+      _logger.LogInformation("Servicio de Sincronización del SMN iniciado.");
+
+      // Ejecutamos una vez al inicio
+      await RunSync(stoppingToken);
+
+      // Luego, se ejecuta cada 3 horas.
+      using var timer = new PeriodicTimer(TimeSpan.FromHours(3));
+
+      while (!stoppingToken.IsCancellationRequested && await timer.WaitForNextTickAsync(stoppingToken))
+      {
+        await RunSync(stoppingToken);
+      }
+    }
+
+    private async Task RunSync(CancellationToken stoppingToken)
+    {
+      if (stoppingToken.IsCancellationRequested) return;
+
+      _logger.LogInformation("Iniciando ciclo de sincronización de datos del SMN a las: {time}", DateTimeOffset.Now);
+
+      using var scope = _serviceProvider.CreateScope();
+      var fetcher = scope.ServiceProvider.GetRequiredService<IDataFetcher>();
+
+      var (success, message) = await fetcher.FetchDataAsync();
+
+      if (success)
+      {
+        _logger.LogInformation("Ciclo de sincronización completado: {message}", message);
+      }
+      else
+      {
+        _logger.LogError("Ciclo de sincronización falló: {message}", message);
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/Clima.Worker/appsettings.json b/src/Clima.Worker/appsettings.json
index b2dcdb6..9f53faf 100644
--- a/src/Clima.Worker/appsettings.json
+++ b/src/Clima.Worker/appsettings.json
@@ -4,5 +4,8 @@
       "Default": "Information",
       "Microsoft.Hosting.Lifetime": "Information"
     }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": ""
   }
 }