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.
51°F11°C & Cloudy
Wind is 2 mph4 km/h from the W, gusting to 6 mph9 km/h
| April 26 | ||||
| 8am | 51°F11°C | 3 mph4 km/h W | Mostly Cloudy | |
| 9am | 51°F11°C | 3 mph5 km/h W | Mostly Cloudy | |
| 10am | 52°F11°C | 3 mph4 km/h W | Cloudy | |
| 11am | 52°F11°C | 3 mph5 km/h SW | Cloudy | |
| 12pm | 54°F12°C | 4 mph6 km/h SW | Cloudy | |
| 1pm | 55°F13°C | 4 mph7 km/h SW | Cloudy | |
| 2pm | 58°F14°C | 5 mph9 km/h SW | Mostly Cloudy | |
| 3pm | 60°F16°C | 9 mph14 km/h W | Mostly Cloudy | |
| 4pm | 63°F17°C | 11 mph17 km/h W | Partly Cloudy | |
| 5pm | 65°F18°C | 13 mph21 km/h SW | Partly Cloudy | |
| 6pm | 65°F19°C | 14 mph23 km/h SW | Partly Cloudy | |
| 7pm | 65°F19°C | 14 mph23 km/h SW | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 26 | 51°F11°C | 66°F19°C | 9 mph14 km/h from SW | Partly Cloudy | Mostly Clear |
| April 27 | 51°F10°C | 69°F21°C | 6 mph10 km/h from SW | Mostly Clear | Clear |
| April 28 | 51°F11°C | 74°F24°C | 6 mph9 km/h from SW | Clear | Clear |
| April 29 | 55°F13°C | 78°F26°C | 5 mph8 km/h from W | Clear | Clear |
| April 30 | 57°F14°C | 78°F25°C | 7 mph11 km/h from W | Clear | Partly Cloudy |
| May 1 | 54°F12°C | 74°F23°C | 6 mph9 km/h from SW | Mostly Clear | Mostly Clear |
| May 2 | 54°F12°C | 73°F23°C | 6 mph10 km/h from SW | Mostly Clear | Mostly Clear |
Yes
Low of 51°F11°C, High of 70°F21°CWind: 6 mph10 km/h
Precipitation: None