Sunday
Patchy fog
High:
90°F
Patchy fog before 11am. Otherwise, sunny, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Ontario, CA Weather - Tomorrow’s Forecast
Sunday Night
Mostly clear
Overnight low:
63°F
Mostly clear, with a low around 63. Southwest wind 5 to 10 mph.