ClimateForecastAprilMay >>

Climate in Saint Charles (Illinois), United States of America

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Weather Forecasts for Saint Charles (IL)

Tue   Apr 23
20°C | 11°C
W 32 km/h
1.4 mm
partly cloudy and  chance of slight rain

partly cloudy and chance of slight rain

Wed   Apr 24
11°C | 2°C
NE 22 km/h
clear and no rain

clear and no rain

Thu   Apr 25
16°C | 0°C
SE 14 km/h
clear and no rain

clear and no rain

The best time of year to visit Saint Charles in the United States of America

During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:

  • When is summer in Saint Charles?
    The hottest season / summer takes place in June, July, August and September.
  • When is winter in Saint Charles?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Saint Charles?
    July has an average maximum temperature of 29°C and is the warmest month of the year.
  • Which is the coldest month in Saint Charles?
    The coldest month is January with an average maximum temperature of -1°C.
  • Which is the wettest month in Saint Charles?
    June tops the wettest month list with 120 mm of rainfall.
  • Which is the driest month in Saint Charles?
    January is the driest month with 47 mm of precipitation.
  • Which is the sunniest month in Saint Charles?
    July is the sunniest month with an average of 319 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.