Little Sullivan Lake Weather Forecast

    • 52
    • 80

    Decreasing Clouds

    • 54
    • 86

    Mostly Sunny

    • 53
    • 88

    Mostly Sunny

    • 54
    • 87

    Mostly Sunny

    • 59
    • 93

    Mostly Sunny

    • 58
    • 94

    Mostly Sunny

    • 54
    • 89

    Mostly Sunny

Today 2 Jul Upper Columbia Basin

Partly cloudy. Highs in the upper 70s to lower 80s. Southwest wind 5 to 15 Mph with Gusts up to 20 Mph.

Tonight 2 Jul Upper Columbia Basin

Mostly cloudy with a chance of Sprinkles in the Evening, then mostly clear overnight. Lows in the 50s. Southwest wind 5 to 15 Mph with Gusts up to 20 Mph.

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Little Sullivan Lake Temperature Statistics

July Temperature

Grant County Airport (27.3 miles)

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Climate (2021–2026)

Grant County Airport (27.3 miles)

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  • Average Low 2021–2026

    40.9 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    64.2 °F
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