Weather state: add descriptions (#34804)

source/_integrations/weather.markdown

@@ -23,27 +23,27 @@ Home Assistant currently supports free web services some of which require regist
 
 ## State and state attributes
 
-A weather {% term entity %}'s state is used to indicate the current overall conditions, e.g. 'cloudy' or 'sunny'.
+A weather {% term entity %}'s state is used to indicate the current overall conditions, such as 'cloudy' or 'sunny'.
 
 ### Condition mapping
 
 The `weather` {% term entity %} can provide the conditions listed below as its state:
 
-- 'clear-night'
+- **Clear-night**: The sky is clear during the night.
-- 'cloudy'
+- **Cloudy**: There are many clouds in the sky.
-- 'fog'
+- **Fog**: There is a thick mist or fog reducing visibility.
-- 'hail'
+- **Hail**: Hailstones are falling.
-- 'lightning'
+- **Lightning**: Lightning/thunderstorms are occurring.
-- 'lightning-rainy'
+- **Lightning-rainy**: Lightning/thunderstorm is occurring along with rain.
-- 'partlycloudy'
+- **Partly cloudy**: The sky is partially covered with clouds.
-- 'pouring'
+- **Pouring**: It is raining heavily.
-- 'rainy'
+- **Rainy**: It is raining.
-- 'snowy'
+- **Snowy**: It is snowing.
-- 'snowy-rainy'
+- **Snowy-rainy**: It is snowing and raining at the same time.
-- 'sunny'
+- **Sunny**: The sky is clear and the sun is shining.
-- 'windy'
+- **Windy**: It is windy.
-- 'windy-variant'
+- **Windy-variant**: It is windy and cloudy.
-- 'exceptional'
+- **Exceptional**: Exceptional weather conditions are occurring.
 
 ### State attributes