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.
56°F13°C & Clear
Wind is 2 mph4 km/h from the NW, gusting to 6 mph9 km/h
| May 2 | ||||
| 6am | 55°F13°C | 2 mph4 km/h NW | Clear | |
| 7am | 55°F13°C | 2 mph4 km/h N | Clear | |
| 8am | 54°F12°C | 3 mph4 km/h N | Clear | |
| 9am | 54°F12°C | 2 mph4 km/h N | Clear | |
| 10am | 55°F13°C | 2 mph4 km/h NW | Mostly Clear | |
| 11am | 58°F14°C | 2 mph4 km/h W | Mostly Clear | |
| 12pm | 61°F16°C | 3 mph5 km/h SW | Clear | |
| 1pm | 64°F18°C | 4 mph7 km/h SW | Clear | |
| 2pm | 68°F20°C | 6 mph10 km/h W | Clear | |
| 3pm | 71°F22°C | 8 mph12 km/h W | Clear | |
| 4pm | 74°F23°C | 8 mph14 km/h W | Clear | |
| 5pm | 76°F24°C | 9 mph15 km/h W | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 2 | 54°F12°C | 77°F25°C | 7 mph12 km/h from W | Clear | Clear |
| May 3 | 54°F12°C | 75°F24°C | 6 mph10 km/h from SW | Clear | Mostly Clear |
| May 4 | 55°F13°C | 70°F21°C | 8 mph13 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| May 5 | 50°F10°C | 64°F18°C | 7 mph11 km/h from SW | Partly Cloudy | Mostly Clear |
| May 6 | 50°F10°C | 74°F23°C | 6 mph10 km/h from SW | Clear | Clear |
| May 7 | 53°F12°C | 73°F23°C | 7 mph10 km/h from SW | Clear | Mostly Clear |
| May 8 | 53°F12°C | 72°F22°C | 7 mph12 km/h from SW | Mostly Clear | Mostly Clear |
Yes
Low of 55°F13°C, High of 75°F24°CWind: 6 mph10 km/h
Precipitation: None