Ontario International Airport Weather Forecast
- 61
- 91
Mostly Sunny
- 63
- 91
Mostly Sunny
- 66
- 93
Mostly Sunny
- 67
- 99
Hot
- 66
- 99
Hot
- 65
- 94
Mostly Sunny
- 64
- 91
Mostly Sunny
Today 6 Jul San Bernardino and Riverside County Valleys-The Inland Empire
Mostly sunny. Highs 91 to 98. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.
Tonight 6 Jul San Bernardino and Riverside County Valleys-The Inland Empire
Clear. Lows 53 to 61. Areas of Winds west to 10 Mph this evening becoming light.
Ontario International Airport Temperature Statistics
July Temperature
Ontario International Airport (1.2 miles)
Lowest 2 July, 2025
57.9 °FAverage July
72.6 °FHighest 4 July, 2025
91.9 °F
Climate (2020–Present)
Ontario International Airport (1.2 miles)
Average Low 2020–2025
55.5 °FAverage 2020–2025
66.7 °FAverage High 2020–2025
79.2 °F