Mount Vernon Weather Forecast

    • 59
    • 89

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

    • 57
    • 81

    Partly Sunny

    • 56
    • 77

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

    • 58
    • 84

    Sunny

Today 25 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 83 to 90. Areas of Winds southwest to 10 Mph becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 25 Jun San Bernardino and Riverside County Valleys-The Inland Empire

Clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows 53 to 57. Areas of Winds west 10 to 15 Mph this evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Vernon Temperature Statistics

June Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 20 June, 2026

    55.4 °F

  • Average June

    70.2 °F

  • Highest 12 June, 2026

    100.4 °F

Climate (2021–2026)

San Bernardino Intl. Airport (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    54.2 °F

  • Average 2021–2026

    63.3 °F

  • Average High 2021–2026

    80.4 °F
Get WillyWeather+ to remove ads