Weather in River Forest in May

General weather information about River Forest

Average annual temperature is 11.1 °C

Absolute maximum temperature: 37.1 °C

Absolute minimum temperature: -20.9 °C

Number of sunny days: 183 days

Number of rainy days: 167 days

Number of snow days: 15 days

Look at detailed online map of River Forest

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

River Forest air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)11.615.021.127.033.433.532.937.134.328.420.115.3
Average daytime temperature (°C)3.56.07.816.921.527.027.826.923.917.19.96.8
Average temperature (°C)-0.40.52.810.015.020.422.422.019.212.65.03.3
Average night temperature (°C)-3.3-3.6-0.84.39.614.917.817.915.19.11.10.7
Absolute minimum temperature (°C)-20.9-18.1-11.1-3.41.78.313.412.59.8-3.2-10.6-7.9

River Forest monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)9.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.510.611.913.414.615.214.913.812.511.19.89.2
Daylight minimum duration (h)9.010.011.012.014.015.014.013.011.010.09.09.0
Sunshine mean duration (h)3.17.76.89.210.511.911.710.78.26.47.13.9
Precipitation (mm)60878310456494041141721233974
Sunny days12189172119131511112116
Rainy days1082213101118161919714
Snow days920000000121

River Forest - weather forecast by months

River Forest weather in januaryRiver Forest weather in februaryRiver Forest weather in marchRiver Forest weather in aprilRiver Forest weather in mayRiver Forest weather in juneRiver Forest weather in julyRiver Forest weather in augustRiver Forest weather in septemberRiver Forest weather in octoberRiver Forest weather in novemberRiver Forest weather in december

Best time to visit River Forest:

The best time to visit River Forest during the most sunny months:

  • May — 10.5(h)
  • June — 11.9(h)
  • July — 11.7(h)
  • August — 10.7(h)

The largest precipitation sum in River Forest is at

  • July — 404(mm)
  • September — 172(mm)

    • Weather forecast in the closest to River Forest admin centers

    Weather forecast in the closest towns to River Forest

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    Frequently asked questions

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