Mount Vernon Weather Forecast

    • 69
    • 95

    Decreasing Clouds

    • 71
    • 100

    Hot

    • 73
    • 106

    Hot

    • 70
    • 104

    Hot

    • 68
    • 94

    Mostly Sunny

    • 68
    • 94

    Mostly Sunny

    • 68
    • 95

    Mostly Sunny

Today 13 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. A slight chance of Showers and Thunderstorms in the afternoon. Highs 90 to 97. Light Winds becoming west 10 Mph in the afternoon. Chance of measurable precipitation 20 percent.

Tonight 13 Jul San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this evening. Becoming mostly clear. Lows 63 to 68. 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 3 July, 2026

    58.1 °F

  • Average July

    74.2 °F

  • Highest 8 July, 2026

    102.2 °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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