Little Sullivan Lake Weather Forecast

    • 30
    • 46

    Increasing Clouds

    • 33
    • 43

    Slight Chance Rain

    • 33
    • 45

    Slight Chance Rain

    • 29
    • 45

    Mostly Cloudy

    • 31
    • 44

    Chance Rain/Snow

    • 32
    • 44

    Chance Rain/Snow

Today 12 Feb Upper Columbia Basin

Patchy fog in the morning. Partly sunny. Highs in the lower to mid 40s. Light Wind, becoming south 5 to 10 Mph in the afternoon.

Tonight 12 Feb Upper Columbia Basin

Partly cloudy. Lows in the upper 20s to lower 30s. South wind 5 to 10 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Little Sullivan Lake Temperature Statistics

February Temperature

Grant County Airport (27.3 miles)

  • Lowest 10 February, 2026

    26.1 °F

  • Average February

    37.7 °F

  • Highest 3 February, 2026

    50.6 °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

    64.2 °F
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