Whale Rock Reservoir Weather Forecast

    • 56
    • 64

    Increasing Clouds

    • 60
    • 70

    Slight Chance Thunderstorms

    • 62
    • 93

    Patchy Fog

    • 63
    • 80

    Mostly Sunny

    • 59
    • 80

    Mostly Sunny

    • 58
    • 76

    Mostly Sunny

Today 7 Sep San Luis Obispo County Beaches

Sunny except for patchy low Clouds and fog in the morning. Highs from the mid 60s to around 70 at the Beaches to around 80 inland. West Winds around 15 Mph in the afternoon.

Tonight 7 Sep San Luis Obispo County Beaches

Mostly clear except for patchy low Clouds and fog after midnight. Lows in the mid to upper 50s.

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Whale Rock Reservoir Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (19.9 miles)

  • Lowest 2 September, 2026

    53.7 °F

  • Average September

    66.5 °F

  • Highest 4 September, 2026

    79.6 °F

Climate (2021–2026)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (19.9 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    73.3 °F
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