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
MeteoGroup   82.50%
Weather Underground   81.94%
The Weather Channel   81.39%
Foreca   80.00%
Dark Sky (forecast.io)   77.30%
AccuWeather   76.67%
NWS Digital Forecast   74.72%
World Weather Online   67.53%
Persistence   66.67%
Last Year
Weather Underground   77.28%
The Weather Channel   77.19%
MeteoGroup   75.73%
AccuWeather   74.83%
Foreca   74.80%
NWS Digital Forecast   71.54%
Dark Sky (forecast.io)   67.00%
World Weather Online   62.65%
Persistence   43.42%

ForecastAdvisor Fact

75.6% of Weather Underground's high temperature forecasts for Chicago were within 3 degrees of actual temperatures last month.