Cottonwood Bay Weather Forecast

    • 58
    • 88

    Mostly Sunny

    • 57
    • 82

    Breezy

    • 60
    • 84

    Mostly Sunny

    • 63
    • 90

    Mostly Sunny

    • 63
    • 91

    Mostly Sunny

    • 61
    • 89

    Partly Sunny

    • 62
    • 89

    Mostly Sunny

Today 15 Sep West Side Mountains north of 198

Sunny. Highs 81 to 91. Southwest Winds up to 10 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 15 Sep West Side Mountains north of 198

Mostly clear. Lows 56 to 62. West Winds 5 to 10 Mph. Gusts up to 30 Mph increasing to 40 Mph after midnight.

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Cottonwood Bay Temperature Statistics

September Temperature

Hollister, CA (21.1 miles)

  • Lowest 2 September, 2026

    50 °F

  • Average September

    69 °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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