diff --git a/homeassistant/components/metoffice/const.py b/homeassistant/components/metoffice/const.py
index e4843d1235e..8b86784b70b 100644
--- a/homeassistant/components/metoffice/const.py
+++ b/homeassistant/components/metoffice/const.py
@@ -52,6 +52,11 @@ CONDITION_CLASSES: dict[str, list[str]] = {
     ATTR_CONDITION_WINDY_VARIANT: [],
     ATTR_CONDITION_EXCEPTIONAL: [],
 }
+CONDITION_MAP = {
+    cond_code: cond_ha
+    for cond_ha, cond_codes in CONDITION_CLASSES.items()
+    for cond_code in cond_codes
+}
 
 VISIBILITY_CLASSES = {
     "VP": "Very Poor",
diff --git a/homeassistant/components/metoffice/sensor.py b/homeassistant/components/metoffice/sensor.py
index fcb8e5b134e..371c396a829 100644
--- a/homeassistant/components/metoffice/sensor.py
+++ b/homeassistant/components/metoffice/sensor.py
@@ -29,7 +29,7 @@ from homeassistant.helpers.update_coordinator import (
 from . import get_device_info
 from .const import (
     ATTRIBUTION,
-    CONDITION_CLASSES,
+    CONDITION_MAP,
     DOMAIN,
     METOFFICE_COORDINATES,
     METOFFICE_DAILY_COORDINATOR,
@@ -221,11 +221,7 @@ class MetOfficeCurrentSensor(
         elif self.entity_description.key == "weather" and hasattr(
             self.coordinator.data.now, self.entity_description.key
         ):
-            value = [
-                k
-                for k, v in CONDITION_CLASSES.items()
-                if self.coordinator.data.now.weather.value in v
-            ][0]
+            value = CONDITION_MAP.get(self.coordinator.data.now.weather.value)
 
         elif hasattr(self.coordinator.data.now, self.entity_description.key):
             value = getattr(self.coordinator.data.now, self.entity_description.key)
diff --git a/homeassistant/components/metoffice/weather.py b/homeassistant/components/metoffice/weather.py
index 8257c8a3c35..0b4672ddec8 100644
--- a/homeassistant/components/metoffice/weather.py
+++ b/homeassistant/components/metoffice/weather.py
@@ -26,7 +26,7 @@ from homeassistant.helpers.update_coordinator import (
 from . import get_device_info
 from .const import (
     ATTRIBUTION,
-    CONDITION_CLASSES,
+    CONDITION_MAP,
     DOMAIN,
     METOFFICE_COORDINATES,
     METOFFICE_DAILY_COORDINATOR,
@@ -55,7 +55,7 @@ async def async_setup_entry(
 def _build_forecast_data(timestep: Timestep) -> Forecast:
     data = Forecast(datetime=timestep.date.isoformat())
     if timestep.weather:
-        data[ATTR_FORECAST_CONDITION] = _get_weather_condition(timestep.weather.value)
+        data[ATTR_FORECAST_CONDITION] = CONDITION_MAP.get(timestep.weather.value)
     if timestep.precipitation:
         data[ATTR_FORECAST_PRECIPITATION_PROBABILITY] = timestep.precipitation.value
     if timestep.temperature:
@@ -67,13 +67,6 @@ def _build_forecast_data(timestep: Timestep) -> Forecast:
     return data
 
 
-def _get_weather_condition(metoffice_code: str) -> str | None:
-    for hass_name, metoffice_codes in CONDITION_CLASSES.items():
-        if metoffice_code in metoffice_codes:
-            return hass_name
-    return None
-
-
 class MetOfficeWeather(
     CoordinatorEntity[DataUpdateCoordinator[MetOfficeData]], WeatherEntity
 ):
@@ -107,7 +100,7 @@ class MetOfficeWeather(
     def condition(self) -> str | None:
         """Return the current condition."""
         if self.coordinator.data.now:
-            return _get_weather_condition(self.coordinator.data.now.weather.value)
+            return CONDITION_MAP.get(self.coordinator.data.now.weather.value)
         return None
 
     @property