5-day weather forecast for Blue Island, Illinois

Weather changeability for Chicago, Illinois

Temperature Last Month Last Year
Average change in high temperature day-to-day 5.2° 6.4°
Average change in low temperature day-to-day 5.9° 7.4°
Precipitation Last Month Last Year
Chance of dry day after a precip day 42% 58%
Chance of precip day after a dry day 33% 27%

Weather forecast accuracy for Chicago, Illinois

Last Month
Dark Sky (forecast.io)   80.28%
Foreca   79.44%
MeteoGroup   79.17%
Weather Underground   77.22%
AccuWeather   76.67%
The Weather Channel   75.56%
NWS Digital Forecast   70.56%
World Weather Online   66.39%
Persistence   41.94%
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

22.2% of Persistence's low temperature forecasts for Chicago were off by more than 10 degrees last month.