Thursday
Patchy fog
High:
71°F
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 71.
Rancho Cucamonga, CA Weather - Extended Forecast
Thursday Night
Clouds increasing
Overnight low:
54°F
Increasing clouds, with a low around 54.
Friday
Clouds clearing
High:
69°F
Cloudy through mid morning, then gradual clearing, with a high near 69.
Friday Night
Clouds increasing
Overnight low:
52°F
Increasing clouds, with a low around 52.
Saturday
Partly sunny
High:
68°F
Saturday Night
Mostly cloudy
Overnight low:
53°F
Sunday
Becoming sunny
High:
73°F
Sunday Night
Patchy fog
Overnight low:
53°F
Memorial Day
Patchy fog
High:
78°F