Yes
you do need a jacket based on the weather in Ontario, CA, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool!
58°F15°C & Clear
Wind is 3 mph5 km/h from the Northwest, gusting to 5 mph8 km/h
| October 25 | ||||
| 2pm | 58°F14°C | 4 mph7 km/h West | Mostly Clear | |
| 3pm | 58°F14°C | 4 mph7 km/h West | Partly Cloudy | |
| 4pm | 60°F16°C | 3 mph5 km/h West | Partly Cloudy | |
| 5pm | 64°F18°C | 2 mph3 km/h South | Partly Cloudy | |
| 6pm | 68°F20°C | 2 mph4 km/h South | Mostly Clear | |
| 7pm | 72°F22°C | 3 mph6 km/h Southwest | Clear | |
| 8pm | 76°F24°C | 5 mph8 km/h Southwest | Mostly Clear | |
| 9pm | 78°F25°C | 6 mph10 km/h Southwest | Partly Cloudy | |
| 10pm | 78°F26°C | 7 mph11 km/h Southwest | Partly Cloudy | |
| 11pm | 77°F25°C | 7 mph12 km/h West | Partly Cloudy | |
| October 26 | ||||
| 12am | 76°F24°C | 7 mph11 km/h West | Mostly Clear | |
| 1am | 72°F22°C | 6 mph10 km/h West | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 25 | 57°F14°C | 78°F26°C | 5 mph8 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| October 26 | 56°F13°C | 76°F24°C | 4 mph7 km/h from Southwest | Mostly Clear | Clear |
| October 27 | 57°F14°C | 80°F27°C | 4 mph7 km/h from Southwest | Clear | Clear |
| October 28 | 62°F17°C | 89°F32°C | 4 mph6 km/h from Northeast | Clear | Clear |
| October 29 | 64°F18°C | 89°F32°C | 4 mph6 km/h from Southwest | Clear | Clear |
| October 30 | 63°F17°C | 84°F29°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| October 31 | 60°F15°C | 82°F28°C | 3 mph5 km/h from West | Mostly Clear | Clear |
Yes
Low of 56°F14°C, High of 76°F25°CWind: 4 mph7 km/h
Precipitation: None