Little Sullivan Lake Weather Forecast

    • 59
    • 92

    Patchy Smoke

    • 56
    • 91

    Patchy Smoke

    • 56
    • 88

    Mostly Sunny

    • 60
    • 92

    Partly Sunny

    • 59
    • 93

    Chance Rain Showers

    • 54
    • 86

    Partly Sunny

Today 17 Aug Upper Columbia Basin

Mostly cloudy in the morning then clearing. Patchy smoke. Highs in the upper 80s to lower 90s. Light Wind, becoming southwest 5 to 10 Mph in the afternoon.

Tonight 17 Aug Upper Columbia Basin

Partly cloudy. Patchy smoke. Lows in the upper 50s to lower 60s. West wind 5 to 10 Mph.

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Little Sullivan Lake Temperature Statistics

August Temperature

Grant County Airport (27.3 miles)

  • Lowest 4 August, 2026

    49.6 °F

  • Average August

    72.2 °F

  • Highest 7 August, 2026

    97.6 °F

Climate (2021–2026)

Grant County Airport (27.3 miles)

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  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    64.1 °F
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