No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
71°F22°C & Clear
Wind is 4 mph6 km/h from the Northwest, gusting to 5 mph8 km/h
| September 1 | ||||
| 9am | 70°F21°C | 3 mph6 km/h Northwest | Clear | |
| 10am | 71°F21°C | 3 mph5 km/h Northeast | Clear | |
| 11am | 75°F24°C | 2 mph3 km/h East | Clear | |
| 12pm | 81°F27°C | 2 mph3 km/h South | Clear | |
| 1pm | 86°F30°C | 3 mph4 km/h South | Clear | |
| 2pm | 91°F33°C | 3 mph5 km/h Southwest | Clear | |
| 3pm | 96°F35°C | 5 mph8 km/h Southwest | Clear | |
| 4pm | 96°F35°C | 7 mph12 km/h Southwest | Clear | |
| 5pm | 97°F36°C | 9 mph15 km/h West | Clear | |
| 6pm | 98°F36°C | 10 mph16 km/h West | Clear | |
| 7pm | 97°F36°C | 11 mph18 km/h West | Mostly Clear | |
| 8pm | 95°F35°C | 11 mph17 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 1 | 70°F21°C | 98°F36°C | 7 mph11 km/h from Southwest | Clear | Mostly Cloudy |
| September 2 | 74°F23°C | 94°F34°C | 4 mph7 km/h from Southeast | Partly Cloudy | Mostly Clear |
| September 3 | 74°F23°C | 95°F35°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 4 | 72°F22°C | 92°F34°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 5 | 69°F20°C | 89°F32°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 6 | 67°F19°C | 88°F31°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 7 | 66°F19°C | 88°F31°C | 6 mph9 km/h from Southwest | Clear | Clear |
No
Low of 74°F24°C, High of 94°F35°CWind: 4 mph7 km/h
Precipitation: 47% rain