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° 6.4°
Average change in low temperature day-to-day 6.0° 7.3°
Precipitation Last Month Last Year
Chance of dry day after a precip day 57% 59%
Chance of precip day after a dry day 17% 26%

Weather forecast accuracy for Chicago, Illinois

Last Month
MeteoGroup   81.67%
The Weather Channel   78.33%
Weather Underground   78.09%
Foreca   77.47%
Dark Sky (forecast.io)   74.44%
National Weather Service   73.61%
CustomWeather   71.11%
WeatherBug   67.78%
AccuWeather   65.56%
Persistence   51.39%
Last Year
MeteoGroup   74.95%
The Weather Channel   74.81%
National Weather Service   71.21%
Foreca   71.12%
Weather Underground   70.14%
AccuWeather   69.66%
CustomWeather   68.85%
WeatherBug   66.81%
Persistence   42.64%

ForecastAdvisor Fact

It rained or snowed 58% of the time in Chicago last year when CustomWeather's text forecasts called for precipitation, and 11% of the time when they did not.