Mount Vernon Weather Forecast

    • 65
    • 90

    Decreasing Clouds

    • 64
    • 91

    Mostly Sunny

    • 64
    • 93

    Mostly Sunny

    • 66
    • 97

    Hot

    • 67
    • 100

    Hot

    • 66
    • 100

    Hot

    • 65
    • 96

    Mostly Sunny

Today 4 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Mostly cloudy. Highs 86 to 92. Areas of Winds west to 10 Mph.

Tonight 4 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Lows 59 to 63. Areas of Winds west to 10 Mph this evening becoming light.

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Mount Vernon Temperature Statistics

July Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 2 July, 2026

    59 °F

  • Average July

    67.4 °F

  • Highest 2 July, 2026

    86 °F

Climate (2021–2026)

San Bernardino Intl. Airport (4.3 miles)

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  • Average Low 2021–2026

    54.2 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    80.4 °F
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