Fix unnecessary db entries for metro_france (#25957)

* fix #25911 avoid db unecessary entries

* use UTC timestamp for forecast

* simplify forecast timestamp

homeassistant/components/meteo_france/__init__.py

@@ -121,7 +121,7 @@ def setup(hass, config):
             weather_alert_client.update_data()
         except VigilanceMeteoError as exp:
             _LOGGER.error(
-                "Unexpected error when creating the" "vigilance_meteoFrance proxy: %s ",
+                "Unexpected error when creating the vigilance_meteoFrance proxy: %s ",
                 exp,
             )
     else:

homeassistant/components/meteo_france/weather.py

@@ -1,5 +1,5 @@
 """Support for Meteo-France weather service."""
-from datetime import datetime, timedelta
+from datetime import timedelta
 import logging
 
 from homeassistant.components.weather import (
@@ -9,6 +9,7 @@ from homeassistant.components.weather import (
     ATTR_FORECAST_TIME,
     WeatherEntity,
 )
+import homeassistant.util.dt as dt_util
 from homeassistant.const import TEMP_CELSIUS
 
 from . import ATTRIBUTION, CONDITION_CLASSES, CONF_CITY, DATA_METEO_FRANCE
@@ -83,8 +84,9 @@ class MeteoFranceWeather(WeatherEntity):
     @property
     def forecast(self):
         """Return the forecast."""
-        reftime = datetime.now().replace(hour=12, minute=00)
+        reftime = dt_util.utcnow().replace(hour=12, minute=0, second=0, microsecond=0)
         reftime += timedelta(hours=24)
+        _LOGGER.debug("reftime used for %s forecast: %s", self._data["name"], reftime)
         forecast_data = []
         for key in self._data["forecast"]:
             value = self._data["forecast"][key]