Big Four Lake Weather Forecast

    • 59
    • 79

    Increasing Clouds

    • 49
    • 65

    Rain Showers

    • 54
    • 67

    Mostly Sunny

    • 59
    • 78

    Sunny

    • 54
    • 79

    Mostly Sunny

    • 51
    • 69

    Partly Sunny

    • 54
    • 71

    Slight Chance Rain Showers

Today 13 Sep Northwest Blue Mountains

Sunny. Highs in the upper 60s to lower 70s, except in the mid 70s to lower 80s Valleys.

Tonight 13 Sep Northwest Blue Mountains

Partly cloudy. Lows in the upper 40s to mid 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Four Lake Temperature Statistics

September Temperature

Pullman / Moscow Regional Airport (42.3 miles)

  • Lowest 10 September, 2025

    50 °F

  • Average September

    72.6 °F

  • Highest 1 September, 2025

    97 °F

Climate (2020–Present)

Pullman / Moscow Regional Airport (42.3 miles)

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  • Average Low 2020–2025

    39.2 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    59.2 °F
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