Grassy Lake Weather Forecast

    • 56
    • 79

    Sunny

    • 54
    • 82

    Sunny

    • 55
    • 83

    Mostly Sunny

    • 58
    • 80

    Partly Sunny

    • 56
    • 73

    Slight Chance Rain Showers

    • 55
    • 74

    Mostly Sunny

    • 56
    • 77

    Sunny

Today 15 Sep Northeastern Mendocino Interior

Sunny. Highs 83 to 98.

Tonight 15 Sep Northeastern Mendocino Interior

Clear. Lows 54 to 64.

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Grassy Lake Temperature Statistics

September Temperature

Ukiah Municipal Airport (37.9 miles)

  • Lowest 7 September, 2025

    50 °F

  • Average September

    69.3 °F

  • Highest 2 September, 2025

    102.9 °F

Climate (2020–Present)

Ukiah Municipal Airport (37.9 miles)

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  • Average Low 2020–2025

    46.8 °F

  • Average 2020–2025

    60.7 °F

  • Average High 2020–2025

    76.3 °F
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