Olympus Lake Weather Forecast

    • 15
    • 26

    Decreasing Clouds

    • 17
    • 38

    Mostly Cloudy

    • 39
    • 40

    Rain

    • 18
    • 46

    Slight Chance Snow Showers

    • 24
    • 32

    Slight Chance Snow Showers

    • 17
    • 35

    Mostly Cloudy

    • 15
    • 28

    Mostly Cloudy

Today 16 Dec Sullivan

Partly sunny. Highs in the upper 20s. Southwest Winds around 5 Mph.

Tonight 16 Dec Sullivan

Partly cloudy. Lows near 15. Southwest Winds around 5 Mph.

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Olympus Lake Temperature Statistics

December Temperature

Monticello, Sullivan County International Airport (11.8 miles)

  • Lowest 5 December, 2025

    -2 °F

  • Average December

    22.6 °F

  • Highest 1 December, 2025

    35.1 °F

Climate (2020–Present)

Monticello, Sullivan County International Airport (11.8 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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