Hi, I'm Pavel, the maker of Forecast Check. When weather apps disagree, I want to know which forecast source has recently been closer to observations nearby. Forecast Check compares nine forecast sources against an airport station over the past 14 days. Every model is scored on the same matched hours of day-ahead temperature forecasts; the Accuracy tab shows average error, bias, sample size and station distance. The main forecast can follow the lowest-error model in that window, or you can choose one yourself. It's a free extension for desktop Chrome with hourly forecasts, a 10-day view, side-by-side model charts and temperature on the toolbar. No account, ads or tracking; 10 interface languages. Your chosen location is saved in your browser and sent to the weather services to retrieve data. Forecasts come from Open-Meteo and observations from NOAA Aviation Weather Center. The comparison measures recent temperature error at a nearby airport, not all weather at your exact location. It doesn't guarantee future accuracy. If nearby stations have insufficient observations, the forecast remains available but there may be no ranking. I'd appreciate feedback on whether the comparison is understandable, whether your city works, and what would make you keep using it.

Forecast Check

Compare weather models with nearby observations

Compare weather models with nearby observations