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 6.0° 6.2°
Average change in low temperature day-to-day 5.2° 7.2°
Precipitation Last Month Last Year
Chance of dry day after a precip day 71% 63%
Chance of precip day after a dry day 32% 22%

Weather forecast accuracy for Grafton, Illinois

Last Month
AccuWeather   82.72%
MeteoGroup   79.94%
The Weather Channel   77.78%
Weather Underground   77.78%
Foreca   76.23%
NWS Digital Forecast   70.68%
Dark Sky (forecast.io)   70.06%
World Weather Online   64.81%
Persistence   41.89%
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

ForecastWatch.com is the largest provider of weather forecast accuracy statistics.