Grassy Lake Weather Forecast

    • 36
    • 54

    Becoming Sunny

    • 38
    • 59

    Sunny

    • 38
    • 62

    Sunny

    • 40
    • 64

    Sunny

    • 39
    • 65

    Sunny

    • 39
    • 63

    Mostly Sunny

Today 11 Jan Northeastern Mendocino Interior

Mostly cloudy early in the morning then becoming partly cloudy. Highs 51 to 62.

Tonight 11 Jan Northeastern Mendocino Interior

Mostly clear. Lows 36 to 46.

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Grassy Lake Temperature Statistics

January Temperature

Ukiah Municipal Airport (37.9 miles)

  • Lowest 8 January, 2026

    35.1 °F

  • Average January

    50 °F

  • Highest 6 January, 2026

    57.9 °F

Climate (2021–Present)

Ukiah Municipal Airport (37.9 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    76 °F
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