Mason Lake Weather Forecast

    • 45
    • 59

    Rain Showers

    • 44
    • 67

    Partly Sunny

    • 44
    • 68

    Mostly Cloudy

    • 45
    • 73

    Mostly Sunny

    • 46
    • 77

    Mostly Sunny

    • 48
    • 81

    Mostly Sunny

Today 13 Sep Spokane Area

Rain Showers in the Morning, then a chance of rain Showers in the afternoon. Highs in the upper 50s. South wind 5 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation near 100 percent. Rainfall Amounts up to a half inch possible.

Tonight 13 Sep Spokane Area

Mostly cloudy. Rain Showers likely in the Evening, then a chance of rain Showers overnight. Lows in the lower to mid 40s. Southwest wind 5 to 15 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an inch.

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Mason Lake Temperature Statistics

September Temperature

Fairchild Air Force Base (19.3 miles)

  • Lowest 5 September, 2026

    43.7 °F

  • Average September

    59.7 °F

  • Highest 1 September, 2026

    81 °F

Climate (2021–2026)

Fairchild Air Force Base (19.3 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    58.6 °F
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