Cottonwood Bay Weather Forecast

    • 59
    • 87

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 59
    • 80

    Sunny

    • 64
    • 87

    Sunny

    • 64
    • 90

    Mostly Sunny

Today 25 Sep West Side Mountains north of 198

Sunny. Highs 81 to 89. Northwest Winds 5 to 10 Mph with Gusts to around 25 Mph.

Tonight 25 Sep West Side Mountains north of 198

Mostly clear. Lows 59 to 65. West Winds up to 10 Mph.

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Cottonwood Bay Temperature Statistics

September Temperature

Hollister, CA (21.1 miles)

  • Lowest 14 September, 2026

    48.2 °F

  • Average September

    66.5 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

Hollister, CA (21.1 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    72.8 °F
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