Sullivan Lake Weather Forecast

    • 35
    • 55

    Increasing Clouds

    • 28
    • 56

    Mostly Cloudy

    • 33
    • 55

    Chance Rain Showers

    • 33
    • 55

    Mostly Cloudy

    • 33
    • 55

    Mostly Cloudy

    • 34
    • 57

    Mostly Cloudy

Today 2 Nov Upper Columbia Basin

Mostly sunny. Highs in the lower to mid 50s. East wind 5 to 10 Mph.

Tonight 2 Nov Upper Columbia Basin

Mostly cloudy. Lows in the mid to upper 30s. Northeast wind 5 to 10 Mph.

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Sullivan Lake Temperature Statistics

November Temperature

Grant County Airport (28 miles)

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  • Average November

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Climate (2021–2026)

Grant County Airport (28 miles)

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  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    64.2 °F
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