Convention Center Weather Forecast

    • 76
    • 104

    Hot

    • 72
    • 94

    Mostly Sunny

    • 68
    • 88

    Mostly Sunny

    • 66
    • 83

    Mostly Sunny

    • 66
    • 82

    Mostly Sunny

    • 64
    • 81

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

Today 9 Sep Orange County Inland

Mostly sunny. Hot. Highs 102 to 106. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 9 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Lows 72 to 75. Light Winds.

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Convention Center Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    76.2 °F

  • Highest 5 September, 2026

    91.7 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.6 °F

  • Average High 2021–2026

    76.9 °F
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