Mount Vernon Weather Forecast

    • 60
    • 92

    Mostly Sunny

    • 61
    • 93

    Increasing Clouds

    • 58
    • 89

    Partly Sunny

    • 62
    • 96

    Partly Sunny

    • 65
    • 99

    Hot

    • 66
    • 102

    Hot

    • 66
    • 101

    Hot

Today 12 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Sunny, warmer. Highs 88 to 94. Areas of Winds east to 10 Mph becoming north this afternoon. Gusts to 25 Mph.

Tonight 12 Mar San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 52 to 55 in wind Sheltered Areas to 55 to 65 in warmer Locations. Areas of Winds north 10 Mph becoming east overnight.

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  • Temperature Real-Time

Mount Vernon Temperature Statistics

March Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 6 March, 2026

    44.1 °F

  • Average March

    60.4 °F

  • Highest 8 March, 2026

    84.2 °F

Climate (2021–Present)

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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