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City of Ontario, CAOntario, CA 7-Day Weather Forecast
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Ontario Weather Forecast
Ontario, CA Weather Forecast Date: 1255 AM PDT Tue Sep 22 2026
Weather forecast for Ontario, CA
Today Hi: 86°FHi: 30°C Lo: 60°F Lo: 16°C |
Today... Partly cloudy this morning...Becoming sunny. Highs 83 to 88. Light winds becoming west 10 to 15 mph with gusts to 25 mph this afternoon. |
Wed Hi: 93°FHi: 34°C Lo: 62°F Lo: 17°C |
Wednesday... Mostly sunny. Highs 89 to 95. Areas of winds east to 10 mph becoming west in the afternoon. |
| Thu Hi: 94°FHi: 34°C Lo: 63°F Lo: 17°C |
Thursday... Mostly sunny in the morning...Becoming partly cloudy. Highs 90 to 96. Light winds becoming southwest 10 mph in the afternoon. |
| Fri Hi: 94°FHi: 34°C Lo: 66°F Lo: 19°C |
Friday... Mostly sunny. Highs 91 to 96. |
| Sat Hi: 92°FHi: 33°C Lo: 64°F Lo: 18°C |
Saturday... Partly cloudy in the morning...Becoming mostly sunny. Highs 89 to 94. |
| Sun Hi: 85°FHi: 29°C Lo: 59°F Lo: 15°C |
Sunday... Partly cloudy in the morning...Becoming mostly sunny. Highs 82 to 87. |
| Mon Hi: 85°FHi: 29°C |
Monday... Mostly sunny. Highs 82 to 86. |
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