Greenhorn Reservoir Weather Forecast

    • 46
    • 57

    Rain

    • 47
    • 57

    Rain

    • 39
    • 58

    Areas Fog

    • 41
    • 63

    Mostly Cloudy

    • 42
    • 67

    Areas Fog

    • 42
    • 67

    Mostly Cloudy

    • 44
    • 66

    Mostly Cloudy

Today 5 Nov Central Siskiyou County

Rain Showers and slight chance of Thunderstorms early this Afternoon, then rain and slight chance of Thunderstorms late this afternoon. Snow level 6500 feet. Highs in the lower 50s to lower 60s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph. Chance of precipitation 80 percent.

Tonight 5 Nov Central Siskiyou County

Mostly cloudy. Rain likely in the Evening, then chance of rain after midnight. Snow level 6500 feet. Lows in the lower to mid 40s. South Winds 10 to 20 Mph decreasing to 5 to 10 Mph after midnight. Chance of rain 60 percent.

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Greenhorn Reservoir Temperature Statistics

November Temperature

Montague Siskiyou County Airport (9.9 miles)

  • Lowest 3 November, 2025

    30.9 °F

  • Average November

    50.2 °F

  • Highest 1 November, 2025

    68 °F

Climate (2020–Present)

Montague Siskiyou County Airport (9.9 miles)

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  • Average Low 2020–2025

    39.6 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    68.8 °F
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