O'Neill Forebay Weather Forecast

    • 56
    • 87

    Sunny

    • 57
    • 88

    Sunny

    • 54
    • 80

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 58
    • 86

    Sunny

    • 60
    • 92

    Mostly Sunny

Today 14 May West Side Mountains north of 198

Sunny. Highs 80 to 88. Northwest Winds up to 15 Mph.

Tonight 14 May West Side Mountains north of 198

Clear. Lows 55 to 61. West Winds 5 to 15 Mph.

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O'Neill Forebay Temperature Statistics

May Temperature

Hollister, CA (23.6 miles)

  • Lowest 9 May, 2026

    44.6 °F

  • Average May

    59.6 °F

  • Highest 7 May, 2026

    80.6 °F

Climate (2021–Present)

Hollister, CA (23.6 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    72.6 °F
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