Cottonwood Bay Weather Forecast

    • 44
    • 51

    Cloudy

    • 47
    • 49

    Rain

    • 52
    • 56

    Rain Likely

    • 50
    • 57

    Rain Showers

    • 47
    • 54

    Rain Likely

    • 45
    • 53

    Chance Rain

    • 45
    • 52

    Chance Rain

Today 30 Dec West Side Mountains north of 198

Partly sunny in the morning then becoming cloudy. Widespread dense fog in the morning. Highs 51 to 57. East Winds up to 5 Mph with Gusts to around 35 Mph.

Tonight 30 Dec West Side Mountains north of 198

Cloudy. Slight chance of rain in the late evening and early morning. Chance of rain late in the night. Near steady temperature in the upper 40s. West Winds up to 5 Mph shifting to the east with Gusts to around 20 Mph after midnight. Chance of rain 50 percent.

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Cottonwood Bay Temperature Statistics

December Temperature

Hollister, CA (21.1 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    50.7 °F

  • Highest 17 December, 2025

    71.6 °F

Climate (2020–Present)

Hollister, CA (21.1 miles)

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  • Average Low 2020–2025

    46.4 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    72.4 °F
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