Irvine Research Center Weather Forecast

    • 68
    • 93

    Increasing Clouds

    • 68
    • 86

    Rain Showers Likely

    • 68
    • 84

    Rain Showers Likely

    • 66
    • 83

    Slight Chance Thunderstorms

    • 67
    • 85

    Partly Sunny

    • 68
    • 88

    Partly Sunny

    • 69
    • 89

    Mostly Sunny

Today 16 Sep Orange County Inland

Patchy fog this morning. Mostly sunny. Highs around 90 towards the coast to 93 farther inland. Light Winds becoming west 10 Mph this afternoon.

Tonight 16 Sep Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Lows around 70. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Irvine Research Center Temperature Statistics

September Temperature

John Wayne-Orange County Airport (8.1 miles)

  • Lowest 12 September, 2025

    64.9 °F

  • Average September

    72.7 °F

  • Highest 3 September, 2025

    86 °F

Climate (2020–Present)

John Wayne-Orange County Airport (8.1 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.7 °F

  • Average High 2020–2025

    73.6 °F
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