Johnson Lake Weather Forecast

    • 44
    • 70

    Increasing Clouds

    • 47
    • 75

    Mostly Cloudy

    • 49
    • 79

    Mostly Sunny

    • 49
    • 82

    Mostly Sunny

    • 51
    • 84

    Mostly Sunny

    • 50
    • 82

    Partly Sunny

    • 48
    • 79

    Partly Sunny

Today 30 Sep Washington Palouse

Partly cloudy. Highs in the mid 60s to lower 70s. West wind 5 to 10 Mph.

Tonight 30 Sep Washington Palouse

Partly cloudy. Lows in the lower to mid 40s. Light wind.

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  • Temperature Real-Time

Johnson Lake Temperature Statistics

September Temperature

Pullman / Moscow Regional Airport (38.5 miles)

  • Lowest 28 September, 2026

    30.9 °F

  • Average September

    58.8 °F

  • Highest 21 September, 2026

    83.6 °F

Climate (2021–2026)

Pullman / Moscow Regional Airport (38.5 miles)

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  • Average Low 2021–2026

    39.2 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    59.6 °F
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