Compare side by side the forecast of the three major numerical weather models for any city. Detect divergences greater than 3 °C between models.
GFS (NOAA/USA): global, ~13 km, 4 cycles/day. ICON (DWD/Germany): global ~13 km and European ~6.5 km. ECMWF IFS (European Centre): global ~9-15 km, generally the highest mean accuracy. Data served by Open-Meteo.