Willow Valley Reservoir Weather Forecast

    • 43
    • 70

    Chance Rain Showers

    • 43
    • 64

    Chance Rain Showers

    • 43
    • 70

    Mostly Sunny

    • 45
    • 76

    Mostly Sunny

    • 46
    • 79

    Partly Sunny

    • 45
    • 78

    Mostly Sunny

Today 16 Sep Northern and Eastern Klamath County and Western Lake County

Mostly cloudy late this morning then becoming partly cloudy. A 10 percent chance of Thunderstorms late this afternoon. Highs in the lower 60s to lower 70s. Northeast Winds 5 to 10 Mph.

Tonight 16 Sep Northern and Eastern Klamath County and Western Lake County

Partly cloudy with a slight chance of Thunderstorms in the Evening, then mostly cloudy with a slight chance of rain after midnight. Lows in the mid 30s to lower 40s. North Winds 10 to 15 Mph decreasing to around 5 Mph well after midnight. Chance of precipitation 20 percent.

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Willow Valley Reservoir Temperature Statistics

September Temperature

Klamath Falls International Airport (32.9 miles)

  • Lowest 7 September, 2026

    31.6 °F

  • Average September

    54.1 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Klamath Falls International Airport (32.9 miles)

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  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    63.3 °F
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