Santiago Peak Weather Forecast

    • 54
    • 63

    Sunny

    • 57
    • 68

    Sunny

    • 58
    • 70

    Sunny

    • 64
    • 75

    Sunny

    • 68
    • 79

    Mostly Sunny

    • 70
    • 80

    Sunny

    • 71
    • 81

    Sunny

Today 28 Sep Santa Ana Mountains and Foothills

Sunny, hot. Highs 93 to 100.

Tonight 28 Sep Santa Ana Mountains and Foothills

Mostly clear. Cooler. Lows 52 to 58. Areas of Winds west to 10 Mph this evening becoming light.

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Santiago Peak Temperature Statistics

September Temperature

Corona Airport (13 miles)

  • Lowest 2 September, 2026

    53.1 °F

  • Average September

    73.7 °F

  • Highest 9 September, 2026

    109 °F

Climate (2021–2026)

Corona Airport (13 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    65.2 °F

  • Average High 2021–2026

    78.4 °F
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