5-day weather forecast for Posen, Illinois

Weather changeability for Chicago, Illinois

Temperature Last Month Last Year
Average change in high temperature day-to-day 4.5° 6.0°
Average change in low temperature day-to-day 5.9° 6.8°
Precipitation Last Month Last Year
Chance of dry day after a precip day 100% 60%
Chance of precip day after a dry day 11% 27%

Weather forecast accuracy for Chicago, Illinois

Last Month
Foreca   84.48%
MeteoGroup   82.47%
AccuWeather   80.75%
Weather Underground   80.36%
The Weather Channel   80.17%
Dark Sky (forecast.io)   75.29%
NWS Digital Forecast   72.99%
World Weather Online   67.24%
Persistence   60.00%
Last Year
MeteoGroup   79.19%
Weather Underground   79.11%
The Weather Channel   78.98%
Foreca   77.30%
AccuWeather   75.88%
Dark Sky (forecast.io)   72.41%
NWS Digital Forecast   71.32%
World Weather Online   63.77%
Persistence   44.10%

ForecastAdvisor Fact

14.3% of World Weather Online's low temperature forecasts for Chicago were off by more than 10 degrees last year.