No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
60°F16°C & Partly Cloudy
Wind is 2 mph4 km/h from the Northwest, gusting to 3 mph5 km/h
| September 11 | ||||
| 10am | 60°F16°C | 3 mph4 km/h Northwest | Mostly Clear | |
| 11am | 63°F17°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 12pm | 65°F18°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| 1pm | 68°F20°C | 3 mph5 km/h Southwest | Partly Cloudy | |
| 2pm | 72°F22°C | 4 mph6 km/h Southwest | Mostly Clear | |
| 3pm | 76°F24°C | 6 mph9 km/h Southwest | Clear | |
| 4pm | 78°F26°C | 7 mph11 km/h Southwest | Clear | |
| 5pm | 79°F26°C | 8 mph13 km/h Southwest | Clear | |
| 6pm | 80°F26°C | 9 mph14 km/h Southwest | Clear | |
| 7pm | 79°F26°C | 10 mph15 km/h Southwest | Clear | |
| 8pm | 78°F26°C | 10 mph16 km/h Southwest | Clear | |
| 9pm | 76°F24°C | 9 mph14 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 60°F16°C | 80°F26°C | 6 mph10 km/h from Southwest | Mostly Clear | Clear |
| September 12 | 60°F16°C | 80°F27°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 13 | 61°F16°C | 83°F29°C | 6 mph9 km/h from Southwest | Clear | Clear |
| September 14 | 63°F17°C | 88°F31°C | 5 mph9 km/h from Southwest | Clear | Clear |
| September 15 | 66°F19°C | 92°F33°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 16 | 70°F21°C | 96°F36°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| September 17 | 73°F23°C | 96°F36°C | 5 mph9 km/h from Southwest | Mostly Clear | Partly Cloudy |
No
Low of 60°F16°C, High of 80°F27°CWind: 6 mph9 km/h
Precipitation: None