O'Neill Forebay Weather Forecast

    • 65
    • 88

    Sunny

    • 70
    • 92

    Sunny

    • 71
    • 97

    Hot

    • 71
    • 97

    Hot

    • 68
    • 90

    Chance Rain

    • 66
    • 89

    Slight Chance Rain

    • 64
    • 86

    Partly Sunny

Today 14 Sep West Side Mountains north of 198

Sunny. Highs 82 to 90. Northwest Winds 5 to 10 Mph with Gusts to around 25 Mph.

Tonight 14 Sep West Side Mountains north of 198

Clear. Lows 62 to 68. West Winds up to 10 Mph.

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O'Neill Forebay Temperature Statistics

September Temperature

Hollister, CA (23.6 miles)

  • Lowest 7 September, 2025

    53.6 °F

  • Average September

    66.8 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

Hollister, CA (23.6 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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