Cottonwood Bay Weather Forecast

    • 69
    • 98

    Hot

    • 67
    • 85

    Chance Rain

    • 66
    • 85

    Chance Rain

    • 66
    • 90

    Sunny

    • 69
    • 91

    Mostly Sunny

    • 70
    • 95

    Chance Rain

    • 64
    • 86

    Chance Rain Showers

Today 17 Sep West Side Mountains north of 198

Sunny. Highs 90 to 98. Northwest Winds up to 10 Mph.

Tonight 17 Sep West Side Mountains north of 198

Mostly cloudy. Lows 68 to 76. West Winds up to 10 Mph with Gusts to around 25 Mph.

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Cottonwood Bay Temperature Statistics

September Temperature

Hollister, CA (21.1 miles)

  • Lowest 7 September, 2025

    53.6 °F

  • Average September

    67.1 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

Hollister, CA (21.1 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    72.6 °F
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