Mount Vernon Weather Forecast

    • 39
    • 59

    Sunny

    • 40
    • 61

    Blowing Dust

    • 44
    • 65

    Blowing Dust

    • 46
    • 70

    Breezy

    • 48
    • 71

    Sunny

    • 52
    • 75

    Mostly Sunny

    • 52
    • 78

    Sunny

Today 8 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming sunny. Highs 56 to 62. Areas of Winds northwest 10 to 20 Mph. Gusts to 30 Mph becoming 35 Mph this afternoon.

Tonight 8 Jan San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Patchy frost in Colder. Wind Sheltered Locations overnight. Colder. Lows 31 to 34 in wind Sheltered Areas to 33 to 41 in warmer Locations. Areas of Winds north 20 to 30 Mph. Gusts to 45 Mph. Becoming 55 Mph overnight.

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Mount Vernon Temperature Statistics

January Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 6 January, 2026

    44.6 °F

  • Average January

    55.2 °F

  • Highest 2 January, 2026

    66.2 °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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