Visual Crossing Weather API provides instant access to both historical weather records and weather forecast data
WeatherAPI.com is a powerful fully managed free weather and geolocation API provider that provides extensive APIs that range from the weather forecast, historical weather, IP lookup, and astronomy through to sports, time zone, and geolocation.
MicroWeather API – An all-in-one weather API: Get the most accurate information, generate invaluable insights, and drive actions – in just a few lines of code.
An advanced weather API to power all of your business needs, from the basic to the most complex weather influenced solutions.
National Weather Service API (api.weather.gov) NOAA (National Oceanic and Atmospheric Administration) provides national weather data as well as past data.
An API for generating Images of Weather Forecasts for Newsletters, Slack Bots, and more!