Mount Vernon Weather Forecast

    • 53
    • 77

    Sunny

    • 53
    • 81

    Sunny

    • 52
    • 80

    Sunny

    • 51
    • 79

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

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

Sunny. Highs 73 to 78. Areas of Winds north 10 to 20 Mph with Gusts to 35 Mph.

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

Clear. Lows 45 to 49 in wind Sheltered Areas to 49 to 56 in warmer Locations. Areas of Winds north 10 to 15 Mph with Gusts to 30 Mph.

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Mount Vernon Temperature Statistics

January Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 10 January, 2026

    37.2 °F

  • Average January

    53 °F

  • Highest 10 January, 2026

    69.8 °F

Climate (2021–Present)

San Bernardino Intl. Airport (4.3 miles)

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  • Average Low 2021–2026

    54.1 °F

  • Average 2021–2026

    63.1 °F

  • Average High 2021–2026

    80.2 °F
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