Olive Hills Reservoir Weather Forecast

    • 43
    • 59

    Increasing Clouds

    • 42
    • 62

    Becoming Sunny

    • 43
    • 62

    Partly Sunny

    • 46
    • 67

    Mostly Sunny

    • 45
    • 66

    Partly Sunny

    • 48
    • 69

    Mostly Sunny

    • 48
    • 71

    Mostly Sunny

Today 17 Jan Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs around 59. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 17 Jan Orange County Inland

Partly cloudy. Lows 40 to 46. Light Winds.

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Olive Hills Reservoir Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (9.3 miles)

  • Lowest 14 January, 2025

    39.9 °F

  • Average January

    58 °F

  • Highest 5 January, 2025

    77.6 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (9.3 miles)

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  • Average Low 2020–2025

    56.9 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.9 °F
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