No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
78°F26°C & Clear
Wind is 9 mph15 km/h from the West, gusting to 16 mph25 km/h
| October 11 | ||||
| 9pm | 76°F24°C | 9 mph14 km/h Southwest | Clear | |
| 10pm | 71°F22°C | 7 mph11 km/h West | Clear | |
| 11pm | 68°F20°C | 6 mph9 km/h West | Clear | |
| October 12 | ||||
| 12am | 66°F19°C | 3 mph5 km/h Northwest | Clear | |
| 1am | 65°F18°C | 3 mph6 km/h North | Clear | |
| 2am | 64°F18°C | 3 mph5 km/h North | Clear | |
| 3am | 63°F17°C | 3 mph5 km/h Northwest | Clear | |
| 4am | 62°F17°C | 3 mph5 km/h Northwest | Clear | |
| 5am | 61°F16°C | 3 mph5 km/h Northwest | Clear | |
| 6am | 60°F16°C | 3 mph5 km/h North | Clear | |
| 7am | 59°F15°C | 4 mph6 km/h North | Clear | |
| 8am | 58°F15°C | 4 mph6 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 11 | 63°F17°C | 83°F28°C | 6 mph9 km/h from West | Clear | Clear |
| October 12 | 56°F14°C | 79°F26°C | 5 mph8 km/h from West | Clear | Clear |
| October 13 | 55°F13°C | 71°F22°C | 6 mph10 km/h from South | Mostly Clear | Rain |
| October 14 | 53°F12°C | 62°F16°C | 7 mph12 km/h from Southwest | Rain | Mostly Clear |
| October 15 | 49°F9°C | 66°F19°C | 3 mph5 km/h from Southwest | Clear | Clear |
| October 16 | 49°F10°C | 75°F24°C | 3 mph5 km/h from North | Clear | Clear |
| October 17 | 55°F13°C | 77°F25°C | 3 mph5 km/h from Southwest | Clear | Clear |
Yes
Low of 56°F14°C, High of 80°F27°CWind: 5 mph8 km/h
Precipitation: None