Big Four Lake Weather Forecast

    • 54
    • 69

    Increasing Clouds

    • 48
    • 73

    Rain Showers

    • 47
    • 54

    Rain Showers Likely

    • 48
    • 64

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

Today 11 Sep Northwest Blue Mountains

Partly cloudy. Highs in the mid 50s to lower 60s, except in the mid to upper 60s Valleys. Southwest wind 5 to 15 Mph with Gusts to around 25 Mph in the Morning, becoming light.

Tonight 11 Sep Northwest Blue Mountains

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

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  • Temperature Real-Time

Big Four Lake Temperature Statistics

September Temperature

Pullman / Moscow Regional Airport (42.3 miles)

  • Lowest 5 September, 2026

    42.7 °F

  • Average September

    58.8 °F

  • Highest 1 September, 2026

    77.6 °F

Climate (2021–2026)

Pullman / Moscow Regional Airport (42.3 miles)

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    59.5 °F
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