Saturday
Sunny
High:
73°F
Sunny, with a high near 73.
Ontario, CA Weather - Extended Forecast
Saturday Night
Mostly clear
Overnight low:
51°F
Mostly clear, with a low around 51.
Sunday
Sunny
High:
76°F
Sunny, with a high near 76.
Sunday Night
Mostly clear
Overnight low:
55°F
Mostly clear, with a low around 55.
Monday
Sunny
High:
81°F
Monday Night
Mostly clear
Overnight low:
57°F
Tuesday
Sunny
High:
82°F
Tuesday Night
Mostly clear
Overnight low:
56°F
Wednesday
Sunny
High:
77°F