Brea Weather Forecast

    • 59
    • 84

    Increasing Clouds

    • 56
    • 81

    Decreasing Clouds

    • 57
    • 82

    Mostly Sunny

    • 57
    • 80

    Partly Sunny

    • 54
    • 71

    Partly Sunny

    • 57
    • 75

    Mostly Sunny

    • 57
    • 79

    Partly Sunny

Today 18 Oct Orange County Inland

Mostly sunny. Highs 81 to 84. Light Winds becoming southwest to 10 Mph this afternoon.

Tonight 18 Oct Orange County Inland

Partly cloudy. Patchy fog overnight. Lows 56 to 60. Light Winds.

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Brea Temperature Statistics

October Temperature

Fullerton, Fullerton Municipal Airport (5.6 miles)

  • Lowest 16 October, 2025

    51.1 °F

  • Average October

    66.8 °F

  • Highest 10 October, 2025

    86 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    56.7 °F

  • Average 2020–2025

    66 °F

  • Average High 2020–2025

    76.5 °F
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