No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
82°F28°C & Clear
Wind is 3 mph5 km/h from the Southwest, gusting to 4 mph7 km/h
| September 7 | ||||
| 1pm | 83°F28°C | 3 mph5 km/h Southwest | Clear | |
| 2pm | 87°F31°C | 5 mph7 km/h Southwest | Clear | |
| 3pm | 91°F33°C | 8 mph12 km/h Southwest | Clear | |
| 4pm | 93°F34°C | 10 mph15 km/h Southwest | Clear | |
| 5pm | 94°F34°C | 11 mph17 km/h West | Clear | |
| 6pm | 94°F34°C | 11 mph18 km/h West | Clear | |
| 7pm | 93°F34°C | 11 mph18 km/h West | Clear | |
| 8pm | 91°F33°C | 11 mph17 km/h West | Clear | |
| 9pm | 88°F31°C | 10 mph16 km/h West | Clear | |
| 10pm | 84°F29°C | 8 mph13 km/h West | Clear | |
| 11pm | 80°F27°C | 7 mph11 km/h West | Clear | |
| September 8 | ||||
| 12am | 78°F25°C | 5 mph8 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 7 | 67°F20°C | 94°F34°C | 7 mph12 km/h from Southwest | Clear | Clear |
| September 8 | 67°F19°C | 89°F32°C | 7 mph11 km/h from Southwest | Clear | Clear |
| September 9 | 62°F17°C | 83°F28°C | 6 mph10 km/h from Southwest | Clear | Mostly Clear |
| September 10 | 61°F16°C | 79°F26°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 11 | 60°F15°C | 78°F26°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 12 | 60°F15°C | 81°F27°C | 5 mph9 km/h from Southwest | Mostly Clear | Clear |
| September 13 | 61°F16°C | 83°F28°C | 6 mph10 km/h from Southwest | Clear | Clear |
No
Low of 67°F20°C, High of 89°F32°CWind: 7 mph11 km/h
Precipitation: None