Mount Vernon Weather Forecast

    • 61
    • 86

    Mostly Sunny

    • 62
    • 92

    Partly Sunny

    • 57
    • 87

    Mostly Sunny

    • 53
    • 81

    Partly Sunny

    • 50
    • 72

    Mostly Sunny

    • 50
    • 73

    Partly Sunny

    • 50
    • 75

    Mostly Sunny

Today 26 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 82 to 88. Light Winds becoming west 10 Mph this afternoon.

Tonight 26 Feb San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows around 56 in wind Sheltered Areas to 57 to 66 in warmer Locations. Areas of Winds west to 10 Mph becoming east 10 Mph overnight.

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Mount Vernon Temperature Statistics

February Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 21 February, 2026

    34.7 °F

  • Average February

    56.1 °F

  • Highest 4 February, 2026

    86 °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

    80.3 °F
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