Oso Flaco Lake Weather Forecast

    • 42
    • 69

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

    • 54
    • 72

    Sunny

    • 53
    • 72

    Sunny

    • 53
    • 71

    Mostly Sunny

    • 50
    • 70

    Sunny

Today 7 Dec San Luis Obispo County Beaches

Sunny. Highs in the mid 60s to lower 70s. North Winds around 15 Mph in the morning.

Tonight 7 Dec San Luis Obispo County Beaches

Mostly clear. Lows in the 40s to lower 50s. North Winds around 15 Mph.

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Oso Flaco Lake Temperature Statistics

December Temperature

Santa Maria Public Airport/Capt G Allan Hancock Field (13 miles)

  • Lowest 4 December, 2025

    37.9 °F

  • Average December

    52.1 °F

  • Highest 5 December, 2025

    69.1 °F

Climate (2020–Present)

Santa Maria Public Airport/Capt G Allan Hancock Field (13 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    56.7 °F

  • Average High 2020–2025

    68.8 °F
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