San Luis Reservoir State Recreation Area Weather Forecast

    • 66
    • 77

    Chance Rain

    • 68
    • 76

    Chance Rain

    • 69
    • 80

    Mostly Sunny

    • 72
    • 82

    Mostly Sunny

    • 72
    • 85

    Partly Sunny

    • 67
    • 78

    Chance Rain

Today 18 Sep West Side Mountains north of 198

Mostly cloudy. Slight chance of rain in the Morning, then chance of rain in the afternoon. Highs 79 to 87. South Winds up to 10 Mph. Chance of rain 50 percent.

Tonight 18 Sep West Side Mountains north of 198

Cooler. Rain Showers likely and slight chance of Thunderstorms. Lows 62 to 68. West Winds up to 5 Mph shifting to the south after midnight. Chance of precipitation 70 percent.

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San Luis Reservoir State Recreation Area Temperature Statistics

September Temperature

Hollister, CA (21.1 miles)

  • Lowest 7 September, 2025

    53.6 °F

  • Average September

    67.1 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

Hollister, CA (21.1 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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