5-day weather forecast for Portage des Sioux, Missouri

Weather changeability for Grafton, Illinois

Temperature Last Month Last Year
Average change in high temperature day-to-day 2.6° 6.2°
Average change in low temperature day-to-day 5.3° 7.2°
Precipitation Last Month Last Year
Chance of dry day after a precip day 50% 63%
Chance of precip day after a dry day 14% 22%
 
 

Weather forecast accuracy for Grafton, Illinois

Last Month
Weather Underground   82.74%
Foreca   82.44%
The Weather Channel   81.25%
AccuWeather   80.95%
MeteoGroup   78.87%
Dark Sky (forecast.io)   72.92%
NWS Digital Forecast   72.22%
World Weather Online   62.80%
Persistence   57.89%
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

4.8% of World Weather Online's high temperature forecasts for Grafton were off by more than 10 degrees last year.