Mount Vernon Weather Forecast
- 73
- 104
Hot
- 74
- 101
Hot
- 73
- 101
Hot
- 73
- 100
Hot
- 72
- 101
Hot
- 72
- 100
Hot
- 69
- 96
Mostly Sunny
Today 3 Oct San Bernardino and Riverside County Valleys-The Inland Empire
Partly cloudy. Highs 85 to 90.
Tonight 3 Oct San Bernardino and Riverside County Valleys-The Inland Empire
Clear. Lows 68 to 73. Areas of Winds east 10 to 15 Mph with Gusts to 25 Mph.
Mount Vernon Temperature Statistics
October Temperature
San Bernardino Intl. Airport (4.3 miles)
Lowest 1 October, 2026
60.8 °FAverage October
73.3 °FHighest 1 October, 2026
98.6 °F
Climate (2021–2026)
San Bernardino Intl. Airport (4.3 miles)
Average Low 2021–2026
54.2 °FAverage 2021–2026
63.2 °FAverage High 2021–2026
80.3 °F