Olive Hills Reservoir Weather Forecast

    • 52
    • 65

    Increasing Clouds

    • 46
    • 65

    Partly Sunny

    • 48
    • 67

    Partly Sunny

    • 48
    • 69

    Partly Sunny

    • 50
    • 71

    Partly Sunny

    • 51
    • 71

    Partly Sunny

Today 23 Jan Orange County Inland

Partly cloudy. Highs 63 to 67. Light Winds.

Tonight 23 Jan Orange County Inland

Partly cloudy in the evening. Becoming cloudy. Lows 50 to 53. Light Winds.

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  • Temperature Real-Time

Olive Hills Reservoir Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (9.3 miles)

  • Lowest 9 January, 2026

    42.1 °F

  • Average January

    62.8 °F

  • Highest 14 January, 2026

    84.9 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (9.3 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    76.4 °F
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