Montclair Weather Forecast

    • 70
    • 99

    Hot

    • 71
    • 100

    Hot

    • 71
    • 99

    Hot

    • 73
    • 100

    Hot

    • 71
    • 99

    Hot

    • 71
    • 99

    Hot

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

Sunny. Highs 99 to 105. Light Winds becoming west 10 to 15 Mph in the afternoon.

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

Clear. Lows 66 to 72. Areas of Winds west to 10 Mph in the evening becoming light.

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Montclair Temperature Statistics

August Temperature

Brackett Field Airport (5 miles)

  • Lowest 4 August, 2026

    64.4 °F

  • Average August

    81.5 °F

  • Highest 8 August, 2026

    98.6 °F

Climate (2021–2026)

Brackett Field Airport (5 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    68 °F

  • Average High 2021–2026

    76 °F
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