Montclair Weather Forecast

    • 55
    • 80

    Increasing Clouds

    • 55
    • 79

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 53
    • 71

    Partly Sunny

    • 53
    • 69

    Partly Sunny

Today 22 May San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming mostly sunny. Highs 81 to 88. Areas of Winds southwest to 10 Mph becoming west with Gusts to 30 Mph this afternoon.

Tonight 22 May San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 50 to 57. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Montclair Temperature Statistics

May Temperature

Brackett Field Airport (5 miles)

  • Lowest 6 May, 2026

    51.8 °F

  • Average May

    68.6 °F

  • Highest 11 May, 2026

    89.6 °F

Climate (2021–Present)

Brackett Field Airport (5 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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