Cottonwood Bay Weather Forecast

    • 63
    • 91

    Increasing Clouds

    • 61
    • 87

    Mostly Cloudy

    • 59
    • 86

    Mostly Sunny

    • 63
    • 89

    Sunny

    • 70
    • 96

    Mostly Sunny

    • 68
    • 98

    Hot

Today 19 Sep West Side Mountains north of 198

Sunny. Highs 83 to 91. North Winds up to 10 Mph.

Tonight 19 Sep West Side Mountains north of 198

Mostly clear in the evening then becoming mostly cloudy. Lows 62 to 68. 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

    68 °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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