Cottonwood Bay Weather Forecast

    • 62
    • 83

    Increasing Clouds

    • 59
    • 82

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 60
    • 85

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 66
    • 91

    Partly Sunny

Today 3 Sep West Side Mountains north of 198

Sunny. Highs 77 to 85. West Winds up to 10 Mph. Gusts up to 35 Mph in the afternoon.

Tonight 3 Sep West Side Mountains north of 198

Mostly clear. Lows 57 to 65. West Winds up to 10 Mph. Gusts up to 30 Mph in the evening.

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Cottonwood Bay Temperature Statistics

September Temperature

Hollister, CA (21.1 miles)

  • Lowest 1 September, 2026

    55.4 °F

  • Average September

    64.5 °F

  • Highest 1 September, 2026

    73.4 °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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