Los Osos Weather Forecast

    • 56
    • 68

    Increasing Clouds

    • 55
    • 63

    Rain Showers Likely

    • 54
    • 62

    Chance Rain Showers

    • 55
    • 63

    Rain Showers

    • 54
    • 62

    Rain Showers

    • 51
    • 60

    Rain Showers

Today 20 Dec San Luis Obispo County Beaches

Mostly cloudy except for patchy low Clouds and fog in the morning. Fog locally dense with visibility one quarter mile or less. Highs in the mid 60s to lower 70s. West Winds around 15 Mph in the afternoon.

Tonight 20 Dec San Luis Obispo County Beaches

Cloudy. A chance of rain in the Evening, then a chance of Showers after midnight. Lows in the mid 50s. West Winds around 15 Mph in the evening. Chance of precipitation 40 percent.

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Los Osos Temperature Statistics

December Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (12.4 miles)

  • Lowest 4 December, 2025

    37 °F

  • Average December

    57.6 °F

  • Highest 10 December, 2025

    82 °F

Climate (2020–Present)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (12.4 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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