Grass Lake Weather Forecast

    • 42
    • 81

    Sunny

    • 46
    • 83

    Mostly Sunny

    • 48
    • 85

    Mostly Sunny

    • 46
    • 83

    Mostly Sunny

    • 44
    • 84

    Mostly Sunny

    • 43
    • 83

    Mostly Sunny

    • 44
    • 83

    Mostly Sunny

Today 22 Aug North Central and Southeast Siskiyou County

Sunny. Highs in the mid 70s to lower 80s. Southwest Winds 10 to 15 Mph.

Tonight 22 Aug North Central and Southeast Siskiyou County

Clear. Lows in the lower 40s to lower 50s. Northwest Winds 5 to 10 Mph shifting to the northeast well after midnight.

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  • Temperature Real-Time

Grass Lake Temperature Statistics

August Temperature

Montague Siskiyou County Airport (17.4 miles)

  • Lowest 16 August, 2026

    47.6 °F

  • Average August

    75.7 °F

  • Highest 7 August, 2026

    104.6 °F

Climate (2021–2026)

Montague Siskiyou County Airport (17.4 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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