Average monthly snow and rainfall in Mattoon (IL)
The mean monthly precipitation over the year in Mattoon (Illinois), including rain, snow, hail.
- A lot of rain (rainy season) falls in the months: April, May, June, July and December.
- On average, April is the wettest month with 149 mm of precipitation.
- On average, January is the driest month with 56 mm of precipitation.
- The average amount of annual precipitation is 1129 mm.
Forecast for Mattoon (IL)
almost clear and no rain
partly cloudy and no rain
partly cloudy and chance of slight rain