Thompson Park Weather Forecast

    • 38
    • 41

    Rain Showers

    • 19
    • 51

    Rain Showers

    • 27
    • 34

    Mostly Cloudy

    • 16
    • 37

    Partly Sunny

    • 16
    • 27

    Partly Sunny

    • 24
    • 33

    Chance Snow Showers

Today 18 Dec Sullivan

Mostly sunny. Highs in the lower 40s. Southeast Winds 5 to 10 Mph.

Tonight 18 Dec Sullivan

A chance of rain in the Evening, then rain after midnight. Lows in the upper 30s. Southeast Winds 15 to 20 Mph. Gusts up to 30 Mph, increasing to 40 Mph after midnight. Chance of rain near 100 percent.

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Thompson Park Temperature Statistics

December Temperature

Monticello, Sullivan County International Airport (4.3 miles)

  • Lowest 5 December, 2025

    -2 °F

  • Average December

    22.2 °F

  • Highest 1 December, 2025

    35.1 °F

Climate (2020–Present)

Monticello, Sullivan County International Airport (4.3 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    45.9 °F

  • Average High 2020–2025

    55.2 °F
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