Anaheim Union Reservoir Weather Forecast

    • 66
    • 87

    Partly Sunny

    • 64
    • 82

    Mostly Sunny

    • 69
    • 89

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 70
    • 92

    Mostly Sunny

Today 27 Sep Orange County Inland

Partly cloudy. Highs 84 to 87. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 27 Sep Orange County Inland

Partly cloudy. Lows 62 to 68. Areas of Winds southwest to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Anaheim Union Reservoir Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (6.8 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    77.5 °F

  • Highest 9 September, 2026

    108.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    76.9 °F
Get WillyWeather+ to remove ads