developers.home-assistant/docs/core/entity/weather.md

title	sidebar_label
Weather Entity	Weather

Properties

:::tip Properties should always only return information from memory and not do I/O (like network requests). Implement update() or async_update() to fetch data. :::

Name	Type	Default	Description
state	string	Required	The current weather condition.
temperature	float	Required	The current temperature in °C or °F.
pressure	float	None	The current air pressure in hPa or inHg.
humidity	float	None	The current humidity in %.
visibility	float	None	The current visibility in km or mi.
wind_speed	float	None	The current wind speed in km/h or mi/h.
wind_bearing	string	None	The current wind bearing, 1-3 letters.
forecast	array	None	Daily or Hourly forecast data.
attribution	string	None	The branding text required by the API provider.

Properties have to follow the units defined in the unit_system.

Forecast

Forecast data should either be daily or hourly.

Name	Type	Default	Description
datetime	string	Required	UTC Date time in RFC 3339 format.
temperature	float	Required	The higher temperature in °C or °F
condition	string	None	The weather condition at this point.
templow	float	None	The lower daily Temperature in °C or °F
precipitation	float	None	The precipitation amount in mm or inch.
precipitation_probability	int	None	The probability of precipitation in %.

Recommended values for state and condition

These weather conditions are included in our translation files and also show the corresponding icon.

Condition	Description
clear-night	Clear night
cloudy	Many clouds
exceptional	Exceptional
fog	Fog
hail	Hail
lightning	Lightning/ thunderstorms
lightning-rainy	Lightning/ thunderstorms and rain
partlycloudy	A few clouds
pouring	Pouring rain
rainy	Rain
snowy	Snow
snowy-rainy	Snow and Rain
sunny	Sunshine
windy	Wind
windy-variant	Wind and clouds

This means that the weather platforms don't need to support languages.