Irmulco Weather Forecast

    • 49
    • 70

    Mostly Sunny

    • 55
    • 82

    Mostly Sunny

    • 60
    • 88

    Partly Sunny

    • 63
    • 92

    Partly Sunny

    • 57
    • 89

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

    • 52
    • 74

    Partly Sunny

Today 6 Sep Southwestern Interior Mendocino

Mostly sunny. Patchy valley fog in the morning. Highs 67 to 77.

Tonight 6 Sep Southwestern Interior Mendocino

Mostly clear. Lows 45 to 55.

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Irmulco Temperature Statistics

September Temperature

Ukiah Municipal Airport (25.5 miles)

  • Lowest 4 September, 2026

    48.9 °F

  • Average September

    63.3 °F

  • Highest 2 September, 2026

    74.6 °F

Climate (2021–2026)

Ukiah Municipal Airport (25.5 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.1 °F
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