Sunday
Mostly sunny
High:
70°F
Mostly sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Rancho Cucamonga, CA Weather - Tomorrow’s Forecast
Sunday Night
Mostly cloudy
Overnight low:
49°F
Mostly cloudy, with a low around 49. West wind 5 to 10 mph becoming light and variable in the evening.