Explanation of Meteorological Attributes Forecasted Every 15 Minutes

Variable Name	Valid Time	Unit	Variable Type	Description
weather_code	Instantaneous	-	Basic Variable	Weather code. Represents weather conditions with numerical codes. Follows WMO weather interpretation codes. Refer to Weather Code Explanation.
temperature_2m	Instantaneous	°C	Basic Variable	Temperature (2m). Air temperature 2 meters above the ground.
apparent_temperature	Instantaneous	°C	Basic Variable	Apparent temperature. Perceived temperature combining wind chill factor, relative humidity, and solar radiation.
visibility	Instantaneous	m	Basic Variable	Visibility (in meters). Affected by low clouds, humidity, and aerosols. Maximum visibility is around 24 kilometers.
is_day	Instantaneous	-	Basic Variable	Day or night. 1 for daytime, 0 for nighttime.
relative_humidity_2m	Instantaneous	%	Rain/Snow Variable	Relative humidity (2m). Relative humidity at 2 meters above the ground.
dew_point_2m	Instantaneous	°C	Rain/Snow Variable	Dew point (2m). Dew point temperature at 2 meters above the ground.
precipitation	Sum of Previous 15 Minutes	mm	Rain/Snow Variable	Precipitation. Total precipitation in the previous 15 minutes (rain, showers, snow).
rain	Sum of Previous 15 Minutes	mm	Rain/Snow Variable	Rainfall.
snowfall	Sum of Previous 15 Minutes	cm	Rain/Snow Variable	Snowfall.
snow_depth	Instantaneous	m	Rain/Snow Variable	Snow depth. Depth of snow on the ground.
freezing_level_height	Instantaneous	m	Rain/Snow Variable	Freezing level height. Altitude where temperature is 0 degrees Celsius.
lightning_potential	Instantaneous	J/kg	Rain/Snow Variable	Lightning Potential Index (LPI).
wind_speed_10m	Instantaneous	km/h	Wind Variable	Wind speed (10m). Wind speed at 10 meters above the ground.
wind_speed_80m	Instantaneous	km/h	Wind Variable	Wind speed (80m). Wind speed at 80 meters above the ground.
wind_direction_10m	Instantaneous	°	Wind Variable	Wind direction (10m). Wind direction at 10 meters above the ground.
wind_direction_80m	Instantaneous	°	Wind Variable	Wind direction (80m). Wind direction at 80 meters above the ground.
wind_gusts_10m	Maximum of Previous 15 Minutes	km/h	Wind Variable	Wind gusts (10m). Maximum value in the previous hour at 10 meters above the ground.
cape	Instantaneous	J/kg	Wind Variable	Convective Available Potential Energy (CAPE).
sunshine_duration	Average of Previous 15 Minutes	seconds	Solar Variable	Sunshine duration.
shortwave_radiation	Average of Previous 15 Minutes	W/m²	Solar Variable	Shortwave solar radiation Global Horizontal Irradiance (GHI).
direct_radiation	Average of Previous 15 Minutes	W/m²	Solar Variable	Direct solar radiation.
diffuse_radiation	Average of Previous 15 Minutes	W/m²	Solar Variable	Diffuse solar radiation Diffuse Horizontal Irradiance (DHI).
direct_normal_irradiance	Average of Previous 15 Minutes	W/m²	Solar Variable	Direct normal irradiance (DNI).
global_tilted_irradiance	Average of Previous 15 Minutes	W/m²	Solar Variable	Global tilted irradiance (GTI).
terrestrial_radiation	Average of Previous 15 Minutes	W/m²	Solar Variable	Terrestrial radiation.
shortwave_radiation_instant	Instantaneous	W/m²	Solar Variable	Instantaneous shortwave solar radiation GHI.
direct_radiation_instant	Instantaneous	W/m²	Solar Variable	Instantaneous direct solar radiation.
diffuse_radiation_instant	Instantaneous	W/m²	Solar Variable	Instantaneous diffuse solar radiation DHI.
direct_normal_irradiance_instant	Instantaneous	W/m²	Solar Variable	Instantaneous direct normal irradiance DNI.
global_tilted_irradiance_instant	Instantaneous	W/m²	Solar Variable	Instantaneous global tilted irradiance GTI.
terrestrial_radiation_instant	Instantaneous	W/m²	Solar Variable	Instantaneous terrestrial radiation.