Arrowhead Weather Forecast

    • 61
    • 84

    Sunny

    • 60
    • 82

    Mostly Sunny

    • 57
    • 75

    Rain Showers

    • 53
    • 66

    Rain Showers

    • 54
    • 71

    Sunny

    • 56
    • 77

    Mostly Sunny

    • 57
    • 78

    Mostly Sunny

Today 19 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Highs 73 to 79.

Tonight 19 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 56 to 61. Areas of Winds east to 10 Mph this evening becoming light.

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Arrowhead Temperature Statistics

October Temperature

San Bernardino Intl. Airport (5 miles)

  • Lowest 14 October, 2026

    48.9 °F

  • Average October

    74.1 °F

  • Highest 2 October, 2026

    104 °F

Climate (2021–2026)

San Bernardino Intl. Airport (5 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    63.3 °F

  • Average High 2021–2026

    80.4 °F
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