San Luis Reservoir SPB Weather Forecast

    • 62
    • 80

    Decreasing Clouds

    • 62
    • 78

    Mostly Sunny

    • 66
    • 82

    Mostly Sunny

    • 72
    • 88

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

    • 66
    • 84

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

Today 20 Sep West Side Mountains north of 198

Sunny. Highs 77 to 85.

Tonight 20 Sep West Side Mountains north of 198

Mostly cloudy early in the evening then becoming partly cloudy. Lows 57 to 63. West Winds up to 10 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Luis Reservoir SPB Temperature Statistics

September Temperature

Hollister, CA (19.3 miles)

  • Lowest 14 September, 2026

    48.2 °F

  • Average September

    67.5 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

Hollister, CA (19.3 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    72.8 °F
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