No
you don't need a jacket based on the weather in Ontario, CA, USA 18 minutes ago
67°F19°C & Clear
Wind is 1 mph2 km/h from the Northwest, gusting to 3 mph5 km/h
| September 5 | ||||
| 9am | 66°F19°C | 3 mph4 km/h Northeast | Clear | |
| 10am | 66°F19°C | 2 mph3 km/h North | Clear | |
| 11am | 70°F21°C | 3 mph4 km/h East | Clear | |
| 12pm | 75°F24°C | 2 mph4 km/h Southeast | Clear | |
| 1pm | 81°F27°C | 2 mph4 km/h South | Clear | |
| 2pm | 86°F30°C | 4 mph6 km/h Southwest | Clear | |
| 3pm | 88°F31°C | 5 mph9 km/h Southwest | Clear | |
| 4pm | 90°F32°C | 8 mph13 km/h Southwest | Clear | |
| 5pm | 92°F33°C | 9 mph15 km/h West | Clear | |
| 6pm | 92°F33°C | 10 mph16 km/h West | Clear | |
| 7pm | 92°F33°C | 11 mph17 km/h West | Clear | |
| 8pm | 90°F32°C | 11 mph17 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 5 | 65°F19°C | 92°F33°C | 7 mph11 km/h from Southwest | Clear | Clear |
| September 6 | 66°F19°C | 92°F33°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 7 | 67°F19°C | 93°F34°C | 6 mph9 km/h from Southwest | Clear | Clear |
| September 8 | 64°F18°C | 88°F31°C | 6 mph10 km/h from Southwest | Clear | Clear |
| September 9 | 63°F17°C | 82°F28°C | 6 mph10 km/h from Southwest | Clear | Mostly Clear |
| September 10 | 61°F16°C | 78°F26°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 11 | 60°F16°C | 80°F27°C | 6 mph9 km/h from Southwest | Mostly Clear | Clear |
No
Low of 66°F19°C, High of 92°F34°CWind: 6 mph10 km/h
Precipitation: None