Olive Hills Reservoir Weather Forecast

    • 66
    • 88

    Increasing Clouds

    • 65
    • 85

    Mostly Sunny

    • 63
    • 83

    Patchy Fog

    • 61
    • 81

    Mostly Sunny

    • 62
    • 82

    Mostly Sunny

    • 65
    • 86

    Sunny

Today 12 Sep Orange County Inland

Partly cloudy this morning. Becoming sunny. Highs 84 to 87 towards the coast to 90 farther inland. Areas of Winds south to 10 Mph.

Tonight 12 Sep Orange County Inland

Partly cloudy in the evening. Becoming mostly cloudy overnight with patchy fog. 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

Olive Hills Reservoir Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (9.3 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    79.2 °F

  • Highest 9 September, 2026

    108 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (9.3 miles)

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

  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.6 °F

  • Average High 2021–2026

    76.9 °F
Get WillyWeather+ to remove ads