Denman Lake Weather Forecast

    • 42
    • 68

    Partly Sunny

    • 44
    • 59

    Rain Showers

    • 32
    • 66

    Rain Showers

    • 27
    • 40

    Mostly Sunny

    • 32
    • 51

    Mostly Sunny

    • 38
    • 58

    Mostly Cloudy

    • 39
    • 60

    Partly Sunny

Today 14 Oct Sullivan

Mostly sunny. Highs in the lower 60s.

Tonight 14 Oct Sullivan

Partly cloudy. Lows in the mid 40s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Denman Lake Temperature Statistics

October Temperature

Monticello, Sullivan County International Airport (10.6 miles)

  • Lowest 7 October, 2026

    30.9 °F

  • Average October

    53.9 °F

  • Highest 2 October, 2026

    79 °F

Climate (2021–2026)

Monticello, Sullivan County International Airport (10.6 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    55.1 °F
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