Johnson Lake Weather Forecast

    • 56
    • 85

    Sunny

    • 56
    • 88

    Sunny

    • 58
    • 89

    Mostly Sunny

    • 55
    • 85

    Partly Sunny

    • 57
    • 80

    Partly Sunny

    • 51
    • 78

    Partly Sunny

    • 53
    • 78

    Mostly Sunny

Today 16 Sep Washington Palouse

Sunny. Highs in the upper 70s to mid 80s. East wind 5 to 15 Mph with Gusts up to 20 Mph.

Tonight 16 Sep Washington Palouse

Clear. Lows in the upper 40s to mid 50s. East wind 5 to 10 Mph.

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  • Temperature Real-Time

Johnson Lake Temperature Statistics

September Temperature

Pullman / Moscow Regional Airport (38.5 miles)

  • Lowest 10 September, 2025

    50 °F

  • Average September

    70.5 °F

  • Highest 1 September, 2025

    97 °F

Climate (2020–Present)

Pullman / Moscow Regional Airport (38.5 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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