Saint John Mountain Weather Forecast

    • 62
    • 73

    Decreasing Clouds

    • 53
    • 69

    Mostly Sunny

    • 55
    • 68

    Mostly Sunny

    • 57
    • 70

    Mostly Sunny

    • 55
    • 69

    Mostly Sunny

    • 57
    • 69

    Mostly Sunny

    • 58
    • 71

    Mostly Sunny

Today 20 Aug Glenn and Colusa County Coast Range Above 3000 ft

Partly cloudy in the morning then becoming mostly cloudy. Highs 75 to 85. Southeast Winds up to 10 Mph.

Tonight 20 Aug Glenn and Colusa County Coast Range Above 3000 ft

Mostly cloudy. Lows 61 to 69. Southwest Winds up to 10 Mph.

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Saint John Mountain Temperature Statistics

August Temperature

Ukiah Municipal Airport (34.2 miles)

  • Lowest 15 August, 2026

    53.7 °F

  • Average August

    77.7 °F

  • Highest 8 August, 2026

    108.6 °F

Climate (2021–2026)

Ukiah Municipal Airport (34.2 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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