Lake Jefferson Weather Forecast

    • 70
    • 97

    Hot

    • 69
    • 93

    Chance Thunderstorms

    • 64
    • 90

    Chance Thunderstorms

    • 62
    • 86

    Rain Showers Likely

    • 60
    • 80

    Rain Showers Likely

    • 60
    • 82

    Slight Chance Thunderstorms

Today 2 Jul Sullivan

Mostly sunny. Hot with Highs in the upper 90s. West Winds 5 to 10 Mph.

Tonight 2 Jul Sullivan

Mostly clear. Humid with Lows in the lower 70s. Northwest Winds around 5 Mph.

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Lake Jefferson Temperature Statistics

July Temperature

Monticello, Sullivan County International Airport (7.5 miles)

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  • Average July

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Climate (2021–2026)

Monticello, Sullivan County International Airport (7.5 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    55 °F
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