Chapman Lake Weather Forecast

    • 45
    • 58

    Rain Showers Likely

    • 43
    • 66

    Partly Sunny

    • 43
    • 67

    Mostly Cloudy

    • 44
    • 72

    Mostly Sunny

    • 46
    • 76

    Sunny

    • 47
    • 80

    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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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chapman Lake Temperature Statistics

September Temperature

Spokane, Spokane International Airport (17.4 miles)

  • Lowest 5 September, 2026

    45.6 °F

  • Average September

    61.9 °F

  • Highest 1 September, 2026

    83.6 °F

Climate (2021–2026)

Spokane, Spokane International Airport (17.4 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    60.1 °F
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