diff --git a/homeassistant/components/openweathermap/const.py b/homeassistant/components/openweathermap/const.py
index d53fbc136b2..1420b1170ca 100644
--- a/homeassistant/components/openweathermap/const.py
+++ b/homeassistant/components/openweathermap/const.py
@@ -157,3 +157,8 @@ CONDITION_CLASSES = {
         904,
     ],
 }
+CONDITION_MAP = {
+    cond_code: cond_ha
+    for cond_ha, cond_codes in CONDITION_CLASSES.items()
+    for cond_code in cond_codes
+}
diff --git a/homeassistant/components/openweathermap/weather_update_coordinator.py b/homeassistant/components/openweathermap/weather_update_coordinator.py
index 732557363d8..cf0c941f0df 100644
--- a/homeassistant/components/openweathermap/weather_update_coordinator.py
+++ b/homeassistant/components/openweathermap/weather_update_coordinator.py
@@ -46,7 +46,7 @@ from .const import (
     ATTR_API_WIND_BEARING,
     ATTR_API_WIND_GUST,
     ATTR_API_WIND_SPEED,
-    CONDITION_CLASSES,
+    CONDITION_MAP,
     DOMAIN,
     FORECAST_MODE_DAILY,
     FORECAST_MODE_HOURLY,
@@ -267,7 +267,7 @@ class WeatherUpdateCoordinator(DataUpdateCoordinator):
                 return ATTR_CONDITION_SUNNY
             return ATTR_CONDITION_CLEAR_NIGHT
 
-        return [k for k, v in CONDITION_CLASSES.items() if weather_code in v][0]
+        return CONDITION_MAP.get(weather_code)
 
 
 class LegacyWeather: