Bonanza Weather Forecast

    • 34
    • 75

    Chance Rain

    • 31
    • 61

    Mostly Sunny

    • 35
    • 69

    Sunny

    • 37
    • 73

    Mostly Sunny

    • 38
    • 76

    Mostly Sunny

    • 41
    • 78

    Mostly Sunny

Today 12 Sep Klamath Basin

Sunny. Slight chance of rain late this afternoon. Highs in the mid 60s to mid 70s. South Winds 5 to 10 Mph shifting to the southwest 10 to 20 Mph this afternoon.

Tonight 12 Sep Klamath Basin

Mostly cloudy in the evening then becoming partly cloudy. A 30 percent chance of rain. Snow level 6500 feet in the evening. Lows in the lower 30s to lower 40s. West Winds 10 to 20 Mph shifting to the southwest 5 to 10 Mph after midnight.

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Bonanza Temperature Statistics

September Temperature

Klamath Falls International Airport (16.2 miles)

  • Lowest 7 September, 2026

    31.6 °F

  • Average September

    52.4 °F

  • Highest 9 September, 2026

    84 °F

Climate (2021–2026)

Klamath Falls International Airport (16.2 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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