TWI
The Weather Index
Diversify Your Forecasts
Compare Forecasts
See how sources agree or disagree so you know what to actually expect.
Source Agreement
Visual indicators show when sources strongly agree or widely diverge.
Hourly & 10-Day
Detailed hourly breakdowns and 10-day forecasts from every source.
20 Weather Sources
10 free global models plus 10 premium commercial APIs.
10 Free Sources
Open-Meteo
GFS
ECMWF
DWD ICON
Canadian GEM
JMA
MET Norway
Météo-France
UK Met Office
NWS
10 Premium Sources
OpenWeatherMap
WeatherAPI
Tomorrow.io
AccuWeather
Visual Crossing
Pirate Weather
Weatherbit
Stormglass
World Weather Online
AerisWeather
Free to use. No account required.