Round Valley Reservoir Weather Forecast

    • 46
    • 75

    Increasing Clouds

    • 45
    • 69

    Rain Showers Likely

    • 43
    • 62

    Rain Showers Likely

    • 44
    • 62

    Chance Rain Showers

    • 43
    • 64

    Chance Rain Showers

    • 45
    • 69

    Partly Sunny

    • 46
    • 71

    Chance Rain Showers

Today 7 Sep Northern and Eastern Klamath County and Western Lake County

Sunny late this morning then becoming partly cloudy. Areas of smoke late this morning. Haze through the day. Chance of Thunderstorms through the day. Chance of Showers early this afternoon. Highs in the lower to mid 70s. Southwest Winds 5 to 10 Mph. Chance of precipitation 30 percent.

Tonight 7 Sep Northern and Eastern Klamath County and Western Lake County

Mostly cloudy. Slight chance of Thunderstorms early this Evening, then slight chance of Showers late this evening and overnight. Lows in the lower to mid 40s. Northwest Winds 5 to 10 Mph shifting to the southeast after midnight. Chance of precipitation 10 percent.

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Round Valley Reservoir Temperature Statistics

September Temperature

Klamath Falls International Airport (32.9 miles)

  • Lowest 1 September, 2025

    44.1 °F

  • Average September

    68.3 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Klamath Falls International Airport (32.9 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    63.2 °F
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