Mount Vernon Weather Forecast

    • 68
    • 95

    Mostly Sunny

    • 68
    • 95

    Mostly Sunny

    • 68
    • 96

    Mostly Sunny

    • 71
    • 98

    Hot

    • 72
    • 103

    Hot

    • 71
    • 101

    Hot

    • 71
    • 102

    Hot

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

Partly cloudy this morning. Becoming mostly sunny. Highs 91 to 97. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

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

Mostly clear this evening. Becoming partly cloudy. Lows 62 to 67. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph this evening becoming light.

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Mount Vernon Temperature Statistics

July Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 3 July, 2026

    58.1 °F

  • Average July

    76.3 °F

  • Highest 15 July, 2026

    104 °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

    80.3 °F
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