No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
63°F17°C & Clear
Wind is 7 mph11 km/h from the Northwest, gusting to 10 mph16 km/h
| January 11 | ||||
| 2pm | 63°F17°C | 7 mph11 km/h Northwest | Clear | |
| 3pm | 66°F19°C | 8 mph12 km/h Northwest | Clear | |
| 4pm | 68°F20°C | 7 mph12 km/h North | Clear | |
| 5pm | 69°F20°C | 7 mph11 km/h North | Clear | |
| 6pm | 69°F20°C | 5 mph8 km/h Northeast | Clear | |
| 7pm | 67°F20°C | 5 mph7 km/h Northeast | Clear | |
| 8pm | 62°F17°C | 6 mph10 km/h Northeast | Clear | |
| 9pm | 60°F15°C | 8 mph12 km/h Northeast | Clear | |
| 10pm | 58°F14°C | 8 mph13 km/h Northeast | Clear | |
| 11pm | 56°F13°C | 8 mph13 km/h Northeast | Clear | |
| January 12 | ||||
| 12am | 55°F13°C | 8 mph14 km/h Northeast | Clear | |
| 1am | 55°F13°C | 10 mph17 km/h Northeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 11 | 43°F6°C | 69°F21°C | 6 mph9 km/h from North | Clear | Clear |
| January 12 | 49°F9°C | 64°F18°C | 6 mph10 km/h from Northeast | Clear | Clear |
| January 13 | 44°F7°C | 61°F16°C | 11 mph17 km/h from Northeast | Clear | Clear |
| January 14 | 45°F7°C | 64°F18°C | 10 mph17 km/h from Northeast | Clear | Clear |
| January 15 | 47°F8°C | 71°F22°C | 4 mph7 km/h from Northeast | Clear | Mostly Clear |
| January 16 | 47°F8°C | 68°F20°C | 3 mph5 km/h from Southwest | Clear | Clear |
| January 17 | 44°F7°C | 61°F16°C | 4 mph7 km/h from Southwest | Clear | Mostly Clear |
Yes
Low of 49°F10°C, High of 64°F18°CWind: 6 mph10 km/h
Precipitation: None