San Joaquin Reservoir Weather Forecast

    • 55
    • 74

    Sunny

    • 54
    • 71

    Mostly Sunny

    • 53
    • 69

    Partly Sunny

    • 53
    • 68

    Patchy Fog

    • 52
    • 69

    Patchy Fog

    • 53
    • 69

    Patchy Fog

    • 54
    • 68

    Partly Sunny

Today 10 Dec Orange County Coastal

Sunny. Highs 72 to 75 at the Beaches to 76 to 79 farther inland and near higher coastal Terrain. Light Winds.

Tonight 10 Dec Orange County Coastal

Mostly clear this evening. Becoming partly cloudy. Lows 52 to 56. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin Reservoir Temperature Statistics

December Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    59.8 °F

  • Highest 8 December, 2025

    73.9 °F

Climate (2020–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.3 °F
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