O'Neill Forebay Weather Forecast

    • 53
    • 59

    Chance Rain

    • 55
    • 57

    Chance Rain

    • 48
    • 58

    Rain Likely

    • 51
    • 55

    Rain Likely

    • 52
    • 57

    Rain

    • 50
    • 54

    Rain

Today 19 Dec West Side Mountains north of 198

Partly sunny. Areas of fog in the morning. A 50 percent chance of rain in the afternoon. Highs in the upper 50s. South Winds up to 5 Mph shifting to the north in the afternoon.

Tonight 19 Dec West Side Mountains north of 198

Mostly cloudy with a 50 percent chance of rain. Patchy fog after midnight. Near steady temperature in the lower 50s. Southwest Winds up to 5 Mph.

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O'Neill Forebay Temperature Statistics

December Temperature

Hollister, CA (23.6 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    46.7 °F

  • Highest 16 December, 2025

    68 °F

Climate (2020–Present)

Hollister, CA (23.6 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    72.3 °F
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