Upper Klamath Lake Weather Forecast

    • 37
    • 48

    Partly Sunny

    • 40
    • 50

    Slight Chance Rain

    • 39
    • 52

    Mostly Cloudy

    • 36
    • 51

    Mostly Sunny

    • 34
    • 51

    Mostly Sunny

    • 36
    • 52

    Mostly Sunny

Today 8 Dec Klamath Basin

Patchy fog in the morning. Mostly cloudy with a 10 percent chance of rain. Highs in the mid 40s to lower 50s. South Winds 5 to 10 Mph.

Tonight 8 Dec Klamath Basin

Mostly cloudy with a 10 percent chance of rain. Lows in the lower to mid 30s. Southwest Winds 10 to 15 Mph.

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Upper Klamath Lake Temperature Statistics

December Temperature

Klamath Falls International Airport (19.3 miles)

  • Lowest 1 December, 2025

    17.1 °F

  • Average December

    33.3 °F

  • Highest 2 December, 2025

    50 °F

Climate (2020–Present)

Klamath Falls International Airport (19.3 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    63.1 °F
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