Olive Hills Reservoir Weather Forecast

    • 57
    • 82

    Sunny

    • 56
    • 83

    Mostly Sunny

    • 54
    • 77

    Mostly Cloudy

    • 54
    • 73

    Partly Sunny

    • 56
    • 76

    Mostly Sunny

    • 57
    • 81

    Sunny

Today 30 Jan Orange County Inland

Sunny. Highs 81 to 85. Areas of Winds northeast 10 to 20 Mph with Gusts to 30 Mph.

Tonight 30 Jan Orange County Inland

Clear. Lows 53 to 57. Areas of Winds northeast 10 to 20 Mph. Gusts to 30 Mph. Becoming 25 Mph overnight.

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  • Temperature Real-Time

Olive Hills Reservoir Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (9.3 miles)

  • Lowest 10 January, 2026

    39.7 °F

  • Average January

    60.9 °F

  • Highest 14 January, 2026

    85.6 °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

    76.5 °F
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