Collier Memorial State Park Weather Forecast

    • 43
    • 80

    Mostly Sunny

    • 43
    • 79

    Mostly Sunny

    • 44
    • 79

    Mostly Sunny

    • 33
    • 71

    Chance Rain

    • 32
    • 57

    Slight Chance Rain

    • 36
    • 66

    Partly Sunny

Today 22 May Klamath Basin

Sunny. Highs in the mid 70s to lower 80s. Northeast Winds around 5 Mph shifting to the west this afternoon.

Tonight 22 May Klamath Basin

Mostly clear. Lows in the lower 40s to lower 50s. Northwest Winds 5 to 10 Mph until well after midnight becoming light.

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Collier Memorial State Park Temperature Statistics

May Temperature

Klamath Falls International Airport (34.8 miles)

  • Lowest 14 May, 2026

    26.7 °F

  • Average May

    54.7 °F

  • Highest 11 May, 2026

    84.7 °F

Climate (2021–Present)

Klamath Falls International Airport (34.8 miles)

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  • Average Low 2021–2026

    34 °F

  • Average 2021–2026

    48.9 °F

  • Average High 2021–2026

    63.5 °F
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