Oso Flaco Lake Weather Forecast

    • 36
    • 67

    Mostly Sunny

    • 39
    • 65

    Sunny

    • 51
    • 64

    Sunny

    • 50
    • 66

    Patchy Fog

    • 51
    • 67

    Sunny

    • 51
    • 71

    Partly Sunny

Today 4 Dec San Luis Obispo County Beaches

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

Tonight 4 Dec San Luis Obispo County Beaches

Clear. Lows in the mid 30s to mid 40s except the mid 40s to around 50 in the Hills. North Winds around 15 Mph shifting to the northeast after midnight.

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Oso Flaco Lake Temperature Statistics

December Temperature

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

  • Lowest 1 December, 2025

    46 °F

  • Average December

    55 °F

  • Highest 1 December, 2025

    66 °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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