Best year time to visit Mattoon

General weather information about Mattoon

Average annual temperature is 7.9 °C

Absolute maximum temperature: 32.7 °C

Absolute minimum temperature: -25.7 °C

Number of sunny days: 176 days

Number of rainy days: 143 days

Number of snow days: 46 days

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* Weather data for Mattoon United States is based on climate observations for 2026 year

Mattoon air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)2.56.47.126.231.532.131.032.732.728.815.910.6
Average daytime temperature (°C)-2.1-0.52.611.820.826.826.225.222.113.45.83.3
Average temperature (°C)-5.7-5.6-2.65.714.020.220.419.617.09.31.3-0.1
Average night temperature (°C)-8.5-9.9-7.00.98.014.115.215.013.26.0-2.0-2.6
Absolute minimum temperature (°C)-24.7-25.7-14.4-10.4-0.36.311.38.06.4-5.4-12.7-9.5

Mattoon monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.014.015.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.210.411.913.514.915.615.214.012.511.09.68.8
Daylight minimum duration (h)8.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)3.86.87.18.010.312.512.910.98.06.06.24.3
Precipitation (mm)45557015724665290841311827
Sunny days18101411201871612122018
Rainy days5441811122415181679
Snow days81413100000334

Mattoon - weather forecast by months

Mattoon weather in januaryMattoon weather in februaryMattoon weather in marchMattoon weather in aprilMattoon weather in mayMattoon weather in juneMattoon weather in julyMattoon weather in augustMattoon weather in septemberMattoon weather in octoberMattoon weather in novemberMattoon weather in december

Best time to visit Mattoon:

The best time to visit Mattoon during the most sunny months:

  • May — 10.3(h)
  • June — 12.5(h)
  • July — 12.9(h)
  • August — 10.9(h)

Months with the longest average daylight duration in Mattoon:

  • June — 15.6(h)

The largest precipitation sum in Mattoon is at

  • April — 157(mm)
  • August — 90(mm)
  • October — 131(mm)

    • Weather forecast in the closest to Mattoon admin centers

    Weather forecast in the closest towns to Mattoon

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    Frequently asked questions

    When is the best time to visit Mattoon?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Mattoon.
    What is the weather like in Mattoon?
    See average temperature, rainfall and daylight hours for Mattoon by month in the table above.
    How many sunny days does Mattoon have?
    The monthly weather statistics above show sunshine and rainfall patterns for Mattoon throughout the year.