Best year time to visit Johnson County

General weather information about Johnson County

Average annual temperature is 11.8 °C

Absolute maximum temperature: 36.6 °C

Absolute minimum temperature: -21.3 °C

Number of sunny days: 204 days

Number of rainy days: 138 days

Number of snow days: 23 days

Look at detailed online map of Johnson County

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

Johnson County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.511.922.426.132.133.434.836.634.130.718.314.3
Average daytime temperature (°C)2.45.18.217.424.829.428.828.426.718.010.56.8
Average temperature (°C)-1.9-0.82.710.418.123.323.523.520.713.45.32.7
Average night temperature (°C)-4.8-5.4-1.24.711.817.218.418.915.99.41.20.0
Absolute minimum temperature (°C)-21.3-20.2-12.3-2.73.29.613.112.211.2-3.3-12.2-7.6

Johnson County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.610.611.913.314.515.114.913.812.511.19.99.2
Daylight minimum duration (h)9.010.011.012.014.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.57.27.09.511.812.512.411.39.97.57.34.5
Precipitation (mm)588565304525785291901873
Sunny days141514192216161916162215
Rainy days79131191415121415613
Snow days1044000000023

Johnson County - weather forecast by months

Johnson County weather in januaryJohnson County weather in februaryJohnson County weather in marchJohnson County weather in aprilJohnson County weather in mayJohnson County weather in juneJohnson County weather in julyJohnson County weather in augustJohnson County weather in septemberJohnson County weather in octoberJohnson County weather in novemberJohnson County weather in december

Best time to visit Johnson County:

The best time to visit Johnson County during the most sunny months:

  • May — 11.8(h)
  • June — 12.5(h)
  • July — 12.4(h)
  • August — 11.3(h)

The largest precipitation sum in Johnson County is at

  • February — 85(mm)
  • July — 78(mm)
  • September — 91(mm)
  • October — 90(mm)

    • Weather forecast in the closest to Johnson County admin centers

    Weather forecast in the closest towns to Johnson County

    Frequently asked questions

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