Average monthly snow and rainfall in Alton (IL)
The mean monthly precipitation over the year in Alton (Illinois), including rain, snow, hail.
- A lot of rain (rainy season) falls in the months: April, May, June and July.
- On average, April is the wettest month with 115 mm of precipitation.
- On average, January is the driest month with 42 mm of precipitation.
- The average amount of annual precipitation is 1007 mm.
Forecast for Alton (IL)
partly cloudy and chance of slight rain
clear and no rain
partly cloudy and no rain