Klamath National Forest Weather Forecast

    • 49
    • 80

    Mostly Sunny

    • 51
    • 75

    Slight Chance Thunderstorms

    • 52
    • 79

    Slight Chance Thunderstorms

    • 53
    • 83

    Sunny

    • 54
    • 87

    Mostly Sunny

    • 55
    • 87

    Mostly Sunny

Today 15 Sep Western Siskiyou County

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

Tonight 15 Sep Western Siskiyou County

Mostly clear. Lows in the mid 40s to lower 50s. North Winds 10 to 15 Mph shifting to the northeast around 5 Mph after midnight.

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Klamath National Forest Temperature Statistics

September Temperature

Montague Siskiyou County Airport (31.1 miles)

  • Lowest 4 September, 2026

    35.7 °F

  • Average September

    60.7 °F

  • Highest 10 September, 2026

    94.6 °F

Climate (2021–2026)

Montague Siskiyou County Airport (31.1 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    69 °F
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