Best year time to visit Sullivan County

General weather information about Sullivan County

Average annual temperature is 12.7 °C

Absolute maximum temperature: 36.5 °C

Absolute minimum temperature: -15.7 °C

Number of sunny days: 205 days

Number of rainy days: 148 days

Number of snow days: 12 days

Look at detailed online map of Sullivan County

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

Sullivan County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)13.215.921.327.831.133.235.936.533.431.820.114.5
Average daytime temperature (°C)4.38.59.518.325.729.830.028.927.619.311.77.5
Average temperature (°C)-0.31.44.011.418.923.524.123.721.214.26.13.6
Average night temperature (°C)-3.5-3.50.05.812.917.719.019.515.810.01.70.5
Absolute minimum temperature (°C)-13.5-15.7-12.1-3.44.011.014.313.510.3-3.4-8.4-5.9

Sullivan County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.014.014.013.011.010.09.0
Daylight mean duration (h)9.710.712.013.314.415.014.713.712.511.110.09.4
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)5.37.66.89.911.212.111.210.910.47.57.24.8
Precipitation (mm)5682854443381001217792075
Sunny days161814171718151421162316
Rainy days118161114121617915613
Snow days421200000012

Sullivan County - weather forecast by months

Sullivan County weather in januarySullivan County weather in februarySullivan County weather in marchSullivan County weather in aprilSullivan County weather in maySullivan County weather in juneSullivan County weather in julySullivan County weather in augustSullivan County weather in septemberSullivan County weather in octoberSullivan County weather in novemberSullivan County weather in december

Best time to visit Sullivan County:

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

  • May — 11.2(h)
  • June — 12.1(h)
  • July — 11.2(h)
  • August — 10.9(h)

The largest precipitation sum in Sullivan County is at

  • February — 82(mm)
  • March — 85(mm)
  • July — 100(mm)
  • August — 121(mm)
  • October — 79(mm)

    • Weather forecast in the closest to Sullivan County admin centers

    Weather forecast in the closest towns to Sullivan County

    Explore Sullivan County

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    MapTrains schedule
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    Frequently asked questions

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