5-day weather forecast for Grafton, Illinois

Weather changeability for Grafton, Illinois

Temperature Last Month Last Year
Average change in high temperature day-to-day 5.5° 6.2°
Average change in low temperature day-to-day 6.0° 7.2°
Precipitation Last Month Last Year
Chance of dry day after a precip day 100% 63%
Chance of precip day after a dry day 11% 22%

Weather forecast accuracy for Grafton, Illinois

Last Month
Weather Underground   85.71%
The Weather Channel   85.34%
Foreca   83.91%
AccuWeather   82.76%
MeteoGroup   81.32%
NWS Digital Forecast   78.74%
Dark Sky (forecast.io)   70.69%
World Weather Online   60.34%
Persistence   58.33%
Last Year
The Weather Channel   78.50%
Weather Underground   77.91%
MeteoGroup   77.24%
Foreca   76.24%
AccuWeather   74.97%
Dark Sky (forecast.io)   70.37%
NWS Digital Forecast   68.79%
World Weather Online   66.00%
Persistence   44.89%

ForecastAdvisor Fact

It rained or snowed 61% of the time in Grafton last year when AccuWeather's text forecasts called for precipitation, and 8% of the time when they did not.