5-day weather forecast for Posen, Illinois

Weather changeability for Chicago, Illinois

Unfortunately, there was not enough data for this station to provide meaningful weather changeability data.

Weather forecast accuracy for Chicago, Illinois

Last Month
The Weather Channel   77.22%
Weather Underground   76.67%
MeteoGroup   76.39%
AccuWeather   72.78%
Foreca   71.94%
NWS Digital Forecast   68.61%
Dark Sky (forecast.io)   63.61%
Last Year
The Weather Channel   75.03%
Weather Underground   74.58%
Foreca   72.97%
MeteoGroup   72.94%
CustomWeather   68.59%
NWS Digital Forecast   68.10%
AccuWeather   68.05%
WeatherBug   63.98%
Persistence   42.33%
 

ForecastAdvisor Fact

1.5% of Weather Underground's low temperature forecasts for Chicago were off by more than 10 degrees last year.