Mount Vernon Weather Forecast

    • 52
    • 80

    Mostly Sunny

    • 50
    • 79

    Mostly Sunny

    • 51
    • 79

    Partly Sunny

    • 51
    • 77

    Mostly Sunny

    • 49
    • 75

    Mostly Sunny

    • 49
    • 73

    Partly Sunny

Today 16 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Sunny. Highs 77 to 81. Areas of Winds north 10 to 15 Mph with Gusts to 25 Mph.

Tonight 16 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 43 to 47 in wind Sheltered Areas to 48 to 55 in warmer Locations. Areas of Winds east 10 to 15 Mph with Gusts to 25 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 13 January, 2026

    78.8 °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 °F

  • Average High 2021–2026

    80.2 °F
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