Weather in Ontario, CA
Updated 2026-08-11 10:00 local time · ZIP codes 91761, 91762, 91764
Cloudy
No government weather alerts were returned for this location at the latest update.
Next hours
77°1% rain
94°1% rain98°0% rain95°0% rain101°0% rain100°0% rain98°1% rain95°1% rain90°1% rain85°1% rain
78°3% rain74°6% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 6%).
It feels like 78°F with winds near 4 mph.
77°F, 1% rain chance and 4 mph wind.
Visibility is around 10 mi; gusts may reach 14 mph.
Current temperature is 77°F, wind 4 mph, rain chance up to 6%.
UV index is 5. Sunscreen and sunglasses are sensible for longer outdoor time.
Ontario weather today
Cloudy and 77°F in Ontario, CA. Today's high is 101°F with a 2% rain chance. Winds are around 4 mph with gusts near 4 mph. Relative humidity is 57%, pressure is 30.01 inHg, and visibility is about 10 miles.
Tonight and tomorrow in Ontario
Sunrise is at 06:09 AM and sunset is at 07:42 PM. Tomorrow's forecast calls for Sunny with a high near 85°F and a low near 73°F. The maximum rain chance is 2%.