Copco Lake Weather Forecast

    • 44
    • 73

    Decreasing Clouds

    • 43
    • 74

    Mostly Sunny

    • 45
    • 75

    Mostly Sunny

    • 48
    • 79

    Mostly Sunny

    • 52
    • 82

    Sunny

    • 55
    • 88

    Mostly Sunny

Today 29 Jun North Central and Southeast Siskiyou County

Partly cloudy in the morning then becoming mostly cloudy. Highs in the mid 60s to mid 70s. North Winds 5 to 10 Mph.

Tonight 29 Jun North Central and Southeast Siskiyou County

Partly cloudy in the evening then becoming mostly clear. Lows in the lower to mid 40s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Copco Lake Temperature Statistics

June Temperature

Montague Siskiyou County Airport (16.2 miles)

  • Lowest 1 June, 2026

    38.6 °F

  • Average June

    68.3 °F

  • Highest 15 June, 2026

    98.7 °F

Climate (2021–2026)

Montague Siskiyou County Airport (16.2 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    69.2 °F
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