Little Sullivan Lake Weather Forecast

    • 29
    • 50

    Increasing Clouds

    • 34
    • 56

    Mostly Cloudy

    • 35
    • 52

    Rain

    • 31
    • 53

    Chance Rain

    • 35
    • 58

    Mostly Sunny

    • 39
    • 64

    Partly Sunny

Today 30 Mar Upper Columbia Basin

Sunny. Highs in the upper 40s to lower 50s. Northwest wind 5 to 15 Mph. Gusts up to 30 Mph in the morning.

Tonight 30 Mar Upper Columbia Basin

Partly cloudy. Lows in the upper 20s to lower 30s. Windy. West wind 15 to 25 Mph with Gusts up to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Little Sullivan Lake Temperature Statistics

March Temperature

Grant County Airport (27.3 miles)

  • Lowest 2 March, 2026

    24.7 °F

  • Average March

    47.3 °F

  • Highest 19 March, 2026

    75.7 °F

Climate (2021–Present)

Grant County Airport (27.3 miles)

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  • Average Low 2021–2026

    41 °F

  • Average 2021–2026

    52.8 °F

  • Average High 2021–2026

    64.3 °F
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