Grass Lake Weather Forecast

    • 32
    • 71

    Sunny

    • 31
    • 65

    Increasing Clouds

    • 27
    • 56

    Partly Sunny

    • 26
    • 57

    Mostly Sunny

    • 30
    • 66

    Sunny

    • 35
    • 71

    Sunny

    • 38
    • 75

    Sunny

Today 14 May North Central and Southeast Siskiyou County

Sunny. Highs in the mid 60s to mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 14 May North Central and Southeast Siskiyou County

Clear. Lows in the lower 30s to lower 40s. Northwest Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

May Temperature

Montague Siskiyou County Airport (17.4 miles)

  • Lowest 9 May, 2026

    36.6 °F

  • Average May

    63.6 °F

  • Highest 11 May, 2026

    88 °F

Climate (2021–Present)

Montague Siskiyou County Airport (17.4 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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