ClimateForecastNovemberDecember >>

Mattoon (IL) Climate by Month

The climate in Mattoon is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to cold in the cooler months. It is also known for its large amounts of rain/snowfall. Now, let’s explore all the climate details to give you a full picture.

Average day and night temperature

In Mattoon, temperatures differ significantly between summer and winter months. Typically, daytime temperatures range from a comfortable 30°C in July to a chilly 2°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to -7°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Mattoon experiences significant rain/snowfall throughout the year, averaging 1129 mm of precipitation annually. The climate in Mattoon shows significant variation throughout the year. Expect high rainfall in April, with an average of 149 mm of precipitation over 12 rainy days. In contrast, January offers drier and sunnier days, with around 56 mm of snow/rainfall over 9 snowy/rainy days.

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

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

Other facts from our historical weather data:
  • When is summer in Mattoon?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Mattoon?
    August has an average maximum temperature of 30°C and is the warmest month of the year.
  • Which is the coldest month in Mattoon?
    The coldest month is January with an average maximum temperature of 2°C.
  • Which is the wettest month in Mattoon?
    April tops the wettest month list with 149 mm of rainfall.
  • Which is the driest month in Mattoon?
    January is the driest month with 56 mm of precipitation.

  • 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.

    Forecast for Mattoon (IL)

    Sat   Nov 23
    6°C | 1°C
    SW 14 km/h
    broken clouds and no rain

    broken clouds and no rain

    Sun   Nov 24
    14°C | 3°C
    S 22 km/h
    broken clouds and no rain

    broken clouds and no rain

    Mon   Nov 25
    13°C | 0°C
    NW 25 km/h
    overcast and no rain

    overcast and no rain