Convention Center Weather Forecast

    • 44
    • 62

    Mostly Sunny

    • 47
    • 67

    Mostly Sunny

    • 49
    • 68

    Mostly Sunny

    • 52
    • 71

    Partly Sunny

    • 54
    • 70

    Rain Showers Likely

    • 55
    • 64

    Rain Showers Likely

Today 27 Dec Orange County Inland

Partly cloudy. Highs 58 to 62. Light Winds.

Tonight 27 Dec Orange County Inland

Mostly clear. Lows 42 to 46. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Convention Center Temperature Statistics

December Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 5 December, 2025

    45 °F

  • Average December

    60.5 °F

  • Highest 10 December, 2025

    84.9 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.4 °F
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