Best year time to visit Jefferson County

General weather information about Jefferson County

Average annual temperature is 15.9 °C

Absolute maximum temperature: 36.0 °C

Absolute minimum temperature: -5.0 °C

Number of sunny days: 181 days

Number of rainy days: 182 days

Number of snow days: 2 days

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

Jefferson County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)20.924.625.829.728.832.735.636.032.929.527.419.2
Average daytime temperature (°C)12.215.516.521.425.128.431.929.928.622.617.212.4
Average temperature (°C)7.19.610.215.019.022.325.924.722.516.611.07.0
Average night temperature (°C)3.65.45.49.614.117.421.520.717.611.66.43.0
Absolute minimum temperature (°C)-3.9-4.7-5.03.87.713.719.115.714.56.3-1.5-3.6

Jefferson County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.09.0
Daylight mean duration (h)10.010.912.013.114.114.614.313.512.411.310.39.8
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.09.09.0
Sunshine mean duration (h)4.95.78.19.210.611.311.710.211.08.87.66.5
Precipitation (mm)15312910110679536812436214172
Sunny days12131915131261417192318
Rainy days17151215181825171312713
Snow days200000000000

Jefferson County - weather forecast by months

Jefferson County weather in januaryJefferson County weather in februaryJefferson County weather in marchJefferson County weather in aprilJefferson County weather in mayJefferson County weather in juneJefferson County weather in julyJefferson County weather in augustJefferson County weather in septemberJefferson County weather in octoberJefferson County weather in novemberJefferson County weather in december

Best time to visit Jefferson County:

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

  • June — 11.3(h)
  • July — 11.7(h)

The largest precipitation sum in Jefferson County is at

  • January — 153(mm)
  • February — 129(mm)
  • April — 106(mm)
  • August — 124(mm)

    • Weather forecast in the closest to Jefferson County admin centers

    Weather forecast in the closest towns to Jefferson County

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    MapTrains schedule
    Plan your trip
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    Frequently asked questions

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