Montclair Weather Forecast

    • 49
    • 63

    Rain Showers

    • 51
    • 69

    Mostly Sunny

    • 56
    • 77

    Sunny

    • 63
    • 83

    Sunny

    • 64
    • 86

    Sunny

    • 63
    • 86

    Sunny

    • 63
    • 86

    Sunny

Today 12 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 80 to 86.

Tonight 12 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy with a chance of Showers this Evening, then partly cloudy with a slight chance of Showers overnight. Cooler. Lows 45 to 50. Areas of Winds southwest to 10 Mph this evening becoming light. Chance of measurable precipitation 50 percent.

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Montclair Temperature Statistics

October Temperature

Brackett Field Airport (5 miles)

  • Lowest 1 October, 2026

    64.4 °F

  • Average October

    87.2 °F

  • Highest 2 October, 2026

    102.2 °F

Climate (2021–2026)

Brackett Field Airport (5 miles)

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  • Average Low 2021–2026

    56.2 °F

  • Average 2021–2026

    68.2 °F

  • Average High 2021–2026

    76.1 °F
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