Collier Memorial State Park Weather Forecast

    • 34
    • 56

    Increasing Clouds

    • 36
    • 65

    Partly Sunny

    • 35
    • 65

    Partly Sunny

    • 33
    • 68

    Mostly Sunny

    • 34
    • 70

    Mostly Sunny

    • 35
    • 71

    Mostly Sunny

Today 25 Sep Klamath Basin

Partly cloudy early this morning then clearing. Highs in the mid 50s to lower 60s. West Winds 10 to 15 Mph.

Tonight 25 Sep Klamath Basin

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 30s to lower 40s. North Winds 10 to 15 Mph.

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Collier Memorial State Park Temperature Statistics

September Temperature

Klamath Falls International Airport (34.8 miles)

  • Lowest 7 September, 2026

    31.6 °F

  • Average September

    55.6 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Klamath Falls International Airport (34.8 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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