7Timer!
Weather, especially for Astroweather
Weather
AccuWeather
Weather and forecast data
Aemet
Weather and forecast data from Spain
AQICN
Air Quality Index Data for over 1000 cities
AviationWeather
NOAA aviation weather forecasts and observations
ColorfulClouds
Weather
Euskalmet
Meteorological data of the Basque Country
Foreca
Weather
HG Weather
Provides weather forecast data for cities in Brazil
Hong Kong Observatory
Provide weather information, earthquake information, and climate data
IPMA
Portuguese weather and climate data
Meteorologisk Institutt
Weather and climate data
ODWeather
Weather and weather webcams
Oikolab
70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF
Open-Meteo
Global weather forecast API for non-commercial use
openSenseMap
Data from Personal Weather Stations called senseBoxes
OpenUV
Real-time UV Index Forecast
OpenWeatherMap
Weather
Pirate Weather
Free weather API with forecast data similar to Dark Sky
QWeather
Location-based weather data
Rainbow Weather
Global real-time nowcasting API powered by radar + satellite fusion
RainViewer
Radar data collected from different websites across the Internet
Storm Glass
Global marine weather from multiple sources
Tomorrow
Weather API Powered by Proprietary Technology
US Weather
US National Weather Service
Visual Crossing
Global historical and weather forecast data
weather-api
A RESTful free API to check the weather
WeatherAPI
Weather API with other stuff like Astronomy and Geolocation API
Weatherbit
Weather
Weatherstack
Real-Time & Historical World Weather Data API
wttr.in
Weather in your terminal, supports JSON output