Cottonwood Bay Weather Forecast

    • 60
    • 86

    Mostly Sunny

    • 63
    • 91

    Partly Sunny

    • 61
    • 87

    Partly Sunny

    • 61
    • 87

    Mostly Sunny

    • 66
    • 91

    Sunny

    • 72
    • 97

    Hot

    • 70
    • 100

    Hot

Today 18 Sep West Side Mountains north of 198

Sunny. Highs 88 to 96.

Tonight 18 Sep West Side Mountains north of 198

Clear until early morning then becoming partly cloudy. Lows 58 to 64. 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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