Thursday
Sunny
High:
99°F
Sunny, with a high near 99. Light west wind becoming southwest 5 to 10 mph in the afternoon.
Ontario, CA Weather - Extended Forecast
Thursday Night
Clear
Overnight low:
71°F
Clear, with a low around 71.
Friday
Sunny
High:
100°F
Sunny, with a high near 100.
Friday Night
Mostly clear
Overnight low:
71°F
Mostly clear, with a low around 71.
Saturday
Sunny
High:
99°F
Saturday Night
Clear
Overnight low:
70°F
Sunday
Sunny
High:
98°F
Sunday Night
Mostly clear
Overnight low:
69°F
Monday
Sunny
High:
97°F