O'Neill Lake Weather Forecast

    • 44
    • 63

    Increasing Clouds

    • 39
    • 62

    Mostly Sunny

    • 44
    • 67

    Partly Sunny

    • 47
    • 70

    Partly Sunny

    • 48
    • 72

    Mostly Sunny

    • 48
    • 73

    Mostly Cloudy

    • 47
    • 67

    Partly Sunny

Today 29 Jan San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers this morning. Highs 60 to 63 in the western Valleys to 54 to 59 near the Foothills. Light Winds becoming southwest 10 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 29 Jan San Diego County Inland Valleys

Partly cloudy this evening. Becoming mostly cloudy. Colder. Lows 33 to 43 in wind Sheltered Areas to 40 to 46 in warmer Locations. Light Winds.

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O'Neill Lake Temperature Statistics

January Temperature

Oceanside, Camp Pendleton, Marine Corps Air Station (2.5 miles)

  • Lowest 15 January, 2025

    30 °F

  • Average January

    58.4 °F

  • Highest 22 January, 2025

    81 °F

Climate (2020–Present)

Oceanside, Camp Pendleton, Marine Corps Air Station (2.5 miles)

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  • Average Low 2020–2025

    54 °F

  • Average 2020–2025

    64 °F

  • Average High 2020–2025

    74.2 °F
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