Rossmoor Weather Forecast

    • 65
    • 79

    Increasing Clouds

    • 67
    • 81

    Partly Sunny

    • 68
    • 86

    Mostly Sunny

    • 70
    • 85

    Slight Chance Thunderstorms

    • 69
    • 83

    Slight Chance Thunderstorms

    • 69
    • 83

    Slight Chance Thunderstorms

    • 66
    • 81

    Mostly Sunny

Today 14 Sep Orange County Inland

Mostly cloudy with patchy fog this morning. Becoming sunny. Highs around 80 towards the coast to 84 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 14 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows 59 to 65. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rossmoor Temperature Statistics

September Temperature

Los Alamitos Army Airfield (2.5 miles)

  • Lowest 11 September, 2025

    61.7 °F

  • Average September

    71.9 °F

  • Highest 3 September, 2025

    86.5 °F

Climate (2020–Present)

Los Alamitos Army Airfield (2.5 miles)

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  • Average Low 2020–2025

    54.3 °F

  • Average 2020–2025

    62.7 °F

  • Average High 2020–2025

    73.2 °F
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