Yes
you do need a jacket based on the weather in Ontario, CA, USA 1 second ago
Why? Because it's not very warm out!
54°F12°C & Clear
Wind is 2 mph4 km/h from the Northeast, gusting to 4 mph6 km/h
| October 17 | ||||
| 1pm | 54°F12°C | 2 mph4 km/h Northeast | Clear | |
| 2pm | 54°F12°C | 2 mph3 km/h Northeast | Clear | |
| 3pm | 56°F13°C | 2 mph4 km/h Northeast | Clear | |
| 4pm | 61°F16°C | 3 mph5 km/h West | Clear | |
| 5pm | 67°F20°C | 4 mph6 km/h North | Clear | |
| 6pm | 72°F22°C | 4 mph6 km/h West | Clear | |
| 7pm | 75°F24°C | 4 mph6 km/h Southwest | Clear | |
| 8pm | 77°F25°C | 4 mph6 km/h Southwest | Clear | |
| 9pm | 79°F26°C | 4 mph6 km/h West | Clear | |
| 10pm | 79°F26°C | 4 mph7 km/h West | Clear | |
| 11pm | 79°F26°C | 5 mph8 km/h West | Clear | |
| October 18 | ||||
| 12am | 78°F26°C | 5 mph8 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 17 | 54°F12°C | 80°F26°C | 4 mph6 km/h from West | Clear | Clear |
| October 18 | 56°F13°C | 83°F28°C | 4 mph6 km/h from Southwest | Clear | Partly Cloudy |
| October 19 | 59°F15°C | 82°F28°C | 4 mph6 km/h from Southwest | Mostly Clear | Clear |
| October 20 | 58°F14°C | 83°F29°C | 3 mph5 km/h from West | Clear | Clear |
| October 21 | 58°F14°C | 75°F24°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
| October 22 | 54°F12°C | 71°F21°C | 5 mph7 km/h from Southwest | Mostly Clear | Partly Cloudy |
| October 23 | 57°F14°C | 77°F25°C | 3 mph6 km/h from Southwest | Mostly Clear | Partly Cloudy |
Yes
Low of 56°F14°C, High of 82°F28°CWind: 4 mph6 km/h
Precipitation: None