Copco Lake Weather Forecast

    • 30
    • 62

    Decreasing Clouds

    • 36
    • 63

    Mostly Sunny

    • 40
    • 73

    Partly Sunny

    • 41
    • 72

    Partly Sunny

    • 43
    • 71

    Mostly Cloudy

    • 39
    • 59

    Chance Rain

Today 25 Mar North Central and Southeast Siskiyou County

Partly cloudy. Highs in the mid 50s to mid 60s. Southwest Winds 10 to 15 Mph. Gusts up to 30 Mph this afternoon.

Tonight 25 Mar North Central and Southeast Siskiyou County

Partly cloudy. Lows in the mid 20s to lower 30s. Northwest Winds 10 to 15 Mph with Gusts to around 30 Mph shifting to the north 5 to 10 Mph well after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Copco Lake Temperature Statistics

March Temperature

Montague Siskiyou County Airport (16.2 miles)

  • Lowest 11 March, 2026

    24.7 °F

  • Average March

    48.8 °F

  • Highest 18 March, 2026

    81.6 °F

Climate (2021–Present)

Montague Siskiyou County Airport (16.2 miles)

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  • Average Low 2021–2026

    39.7 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    69.2 °F
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