Grass Lake Weather Forecast

    • 38
    • 67

    Mostly Sunny

    • 36
    • 65

    Increasing Clouds

    • 37
    • 58

    Chance Rain

    • 37
    • 57

    Chance Rain

    • 26
    • 48

    Rain

    • 23
    • 45

    Snow Likely

    • 30
    • 56

    Sunny

Today 28 Mar North Central and Southeast Siskiyou County

Partly cloudy. Highs in the lower 60s to lower 70s. West Winds 10 to 15 Mph.

Tonight 28 Mar North Central and Southeast Siskiyou County

Partly cloudy early this evening then clearing. Lows in the mid 30s to lower 40s. West Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grass Lake Temperature Statistics

March Temperature

Montague Siskiyou County Airport (17.4 miles)

  • Lowest 11 March, 2026

    24.7 °F

  • Average March

    49.5 °F

  • Highest 18 March, 2026

    81.6 °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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