No
you don't need a jacket based on the weather in Ontario, CA, USA 1 second ago
73°F23°C & Partly Cloudy
Wind is 7 mph12 km/h from the West, gusting to 12 mph19 km/h
| March 20 | ||||
| 5pm | 73°F23°C | 8 mph13 km/h West | Clear | |
| 6pm | 73°F23°C | 8 mph12 km/h West | Clear | |
| 7pm | 73°F23°C | 9 mph14 km/h Southwest | Mostly Clear | |
| 8pm | 71°F22°C | 9 mph15 km/h Southwest | Mostly Clear | |
| 9pm | 69°F20°C | 9 mph14 km/h Southwest | Mostly Clear | |
| 10pm | 65°F18°C | 6 mph10 km/h West | Mostly Clear | |
| 11pm | 62°F17°C | 5 mph7 km/h West | Clear | |
| March 21 | ||||
| 12am | 59°F15°C | 3 mph4 km/h West | Clear | |
| 1am | 57°F14°C | 2 mph4 km/h North | Mostly Clear | |
| 2am | 55°F13°C | 2 mph4 km/h North | Mostly Clear | |
| 3am | 54°F12°C | 3 mph4 km/h Northeast | Mostly Clear | |
| 4am | 53°F12°C | 3 mph5 km/h Northeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| March 20 | 49°F10°C | 73°F23°C | 5 mph8 km/h from Southwest | Clear | Clear |
| March 21 | 49°F10°C | 76°F24°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| March 22 | 50°F10°C | 73°F23°C | 5 mph7 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| March 23 | 52°F11°C | 76°F25°C | 4 mph7 km/h from Southwest | Clear | Clear |
| March 24 | 57°F14°C | 84°F29°C | 4 mph7 km/h from Southwest | Clear | Clear |
| March 25 | 58°F14°C | 79°F26°C | 6 mph9 km/h from West | Mostly Clear | Partly Cloudy |
| March 26 | 55°F13°C | 72°F22°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 49°F10°C, High of 76°F25°CWind: 4 mph7 km/h
Precipitation: None