Whale Rock Reservoir Weather Forecast

    • 58
    • 69

    Partly Cloudy

    • 57
    • 66

    Mostly Sunny

    • 52
    • 67

    Mostly Sunny

    • 54
    • 62

    Partly Sunny

    • 57
    • 61

    Chance Rain Showers

    • 56
    • 60

    Chance Rain

    • 55
    • 58

    Chance Rain

Today 16 Dec San Luis Obispo County Beaches

Sunny. Highs in the upper 60s to mid 70s. Northwest Winds around 15 Mph in the afternoon.

Tonight 16 Dec San Luis Obispo County Beaches

Partly cloudy except for patchy low Clouds and fog after midnight. Fog locally dense with visibility one quarter mile or less. Lows in the upper 40s and 50s. Northwest Winds around 15 Mph.

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Whale Rock Reservoir Temperature Statistics

December Temperature

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

  • Lowest 4 December, 2025

    37 °F

  • Average December

    56.8 °F

  • Highest 10 December, 2025

    82 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    50 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    72.8 °F
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