Weather in Wheaton in September

General weather information about Wheaton

Average annual temperature is 13.9 °C

Absolute maximum temperature: 36.8 °C

Absolute minimum temperature: -9.7 °C

Number of sunny days: 180 days

Number of rainy days: 184 days

Number of snow days: 1 day

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

Wheaton air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)17.722.724.630.028.533.236.633.536.827.123.715.7
Average daytime temperature (°C)9.411.312.521.422.527.031.129.625.820.412.99.8
Average temperature (°C)5.36.06.714.616.220.825.023.820.514.87.35.5
Average night temperature (°C)2.01.71.89.210.415.420.319.216.010.43.22.1
Absolute minimum temperature (°C)-3.1-9.7-5.21.24.511.217.815.110.35.2-5.7-3.9

Wheaton monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.810.712.013.214.314.914.613.712.411.210.19.5
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)5.26.37.49.410.810.611.910.68.38.67.85.4
Precipitation (mm)82598611832165156581184268177
Sunny days12151517151251415182418
Rainy days19121613161826171513613
Snow days010000000000

Wheaton - weather forecast by months

Wheaton weather in januaryWheaton weather in februaryWheaton weather in marchWheaton weather in aprilWheaton weather in mayWheaton weather in juneWheaton weather in julyWheaton weather in augustWheaton weather in septemberWheaton weather in octoberWheaton weather in novemberWheaton weather in december

Best time to visit Wheaton:

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

  • May — 10.8(h)
  • July — 11.9(h)

The largest precipitation sum in Wheaton is at

  • June — 165(mm)
  • July — 156(mm)
  • December — 177(mm)

    • Weather forecast in the closest to Wheaton admin centers

    Weather forecast in the closest towns to Wheaton

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    Frequently asked questions

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