Rancho Cucamonga Weather Forecast
- 55
- 72
Mostly Cloudy
- 54
- 76
Mostly Sunny
- 56
- 80
Mostly Sunny
- 58
- 83
Mostly Sunny
- 61
- 89
Mostly Sunny
- 60
- 87
Mostly Sunny
Today 28 May San Bernardino and Riverside County Valleys-The Inland Empire
Mostly cloudy in the morning. Becoming partly cloudy. Patchy fog in the morning. Patchy drizzle in the morning. Highs 71 to 76. Light Winds becoming west 15 Mph with Gusts to 25 Mph in the afternoon.
Tonight 28 May San Bernardino and Riverside County Valleys-The Inland Empire
Partly cloudy in the evening. Becoming mostly cloudy. Patchy fog overnight. Lows 49 to 55. Areas of Winds southwest 15 Mph with Gusts to 25 Mph in the evening becoming light.
Rancho Cucamonga Temperature Statistics
May Temperature
Ontario International Airport (3.7 miles)
Lowest 11 May, 2022
48 °FAverage May
65.9 °FHighest 14 May, 2022
97 °F
Climate (2010–Present)
Ontario International Airport (3.7 miles)
Average Low 2010–Present
56 °FAverage 2010–Present
66.3 °FAverage High 2010–Present
79.3 °F