Greenhorn Reservoir Weather Forecast

    • 44
    • 81

    Sunny

    • 45
    • 81

    Mostly Sunny

    • 43
    • 78

    Mostly Sunny

    • 41
    • 77

    Mostly Sunny

    • 39
    • 64

    Partly Sunny

    • 37
    • 61

    Mostly Sunny

Today 15 Oct Central Siskiyou County

Sunny. Highs in the mid 70s to mid 80s. East Winds 5 to 10 Mph.

Tonight 15 Oct Central Siskiyou County

Clear. Lows in the lower to mid 40s. East Winds 5 to 10 Mph.

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Greenhorn Reservoir Temperature Statistics

October Temperature

Montague Siskiyou County Airport (9.9 miles)

  • Lowest 12 October, 2026

    30.9 °F

  • Average October

    61.9 °F

  • Highest 7 October, 2026

    93.7 °F

Climate (2021–2026)

Montague Siskiyou County Airport (9.9 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    69.1 °F
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