Best year time to visit Rock Falls

General weather information about Rock Falls

Average annual temperature is 10.0 °C

Absolute maximum temperature: 38.3 °C

Absolute minimum temperature: -27.0 °C

Number of sunny days: 197 days

Number of rainy days: 138 days

Number of snow days: 30 days

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

Rock Falls air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)6.59.817.227.431.131.933.138.334.429.918.412.0
Average daytime temperature (°C)-1.81.35.615.024.128.527.828.525.716.29.45.4
Average temperature (°C)-5.8-4.60.08.617.422.622.123.020.011.54.00.9
Average night temperature (°C)-9.1-9.2-4.23.611.116.616.618.215.17.7-0.1-2.1
Absolute minimum temperature (°C)-26.8-27.0-16.4-4.91.98.811.012.08.1-5.4-13.5-8.0

Rock Falls 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)9.410.511.913.414.715.315.013.912.511.09.79.0
Daylight minimum duration (h)9.09.011.012.014.015.014.013.011.010.09.08.0
Sunshine mean duration (h)4.06.87.38.912.012.412.611.59.87.36.94.3
Precipitation (mm)58536073653863568089546
Sunny days201512141915131713152420
Rainy days8971212151814171448
Snow days3412400000223

Rock Falls - weather forecast by months

Rock Falls weather in januaryRock Falls weather in februaryRock Falls weather in marchRock Falls weather in aprilRock Falls weather in mayRock Falls weather in juneRock Falls weather in julyRock Falls weather in augustRock Falls weather in septemberRock Falls weather in octoberRock Falls weather in novemberRock Falls weather in december

Best time to visit Rock Falls:

The best time to visit Rock Falls during the most sunny months:

  • May — 12.0(h)
  • June — 12.4(h)
  • July — 12.6(h)
  • August — 11.5(h)

Months with the longest average daylight duration in Rock Falls:

  • June — 15.3(h)

The largest precipitation sum in Rock Falls is at

  • April — 73(mm)
  • September — 80(mm)
  • October — 89(mm)

    • Weather forecast in the closest to Rock Falls admin centers

    Weather forecast in the closest towns to Rock Falls

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    Frequently asked questions

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