No
you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
60°F16°C & Cloudy
Wind is 4 mph6 km/h from the South, gusting to 8 mph13 km/h
| May 5 | ||||
| 4pm | 60°F16°C | 4 mph6 km/h South | Cloudy | |
| 5pm | 62°F17°C | 5 mph7 km/h Southwest | Cloudy | |
| 6pm | 63°F17°C | 5 mph8 km/h Southwest | Cloudy | |
| 7pm | 63°F17°C | 5 mph9 km/h Southwest | Cloudy | |
| 8pm | 63°F17°C | 9 mph14 km/h West | Mostly Cloudy | |
| 9pm | 62°F17°C | 9 mph14 km/h West | Mostly Cloudy | |
| 10pm | 60°F16°C | 8 mph13 km/h Southwest | Mostly Cloudy | |
| 11pm | 59°F15°C | 7 mph11 km/h Southwest | Mostly Cloudy | |
| May 6 | ||||
| 12am | 58°F14°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 1am | 56°F14°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 2am | 55°F13°C | 4 mph6 km/h Southwest | Partly Cloudy | |
| 3am | 54°F12°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 5 | 52°F11°C | 63°F17°C | 5 mph8 km/h from Southwest | Cloudy | Mostly Cloudy |
| May 6 | 52°F11°C | 67°F20°C | 6 mph9 km/h from Southwest | Mostly Cloudy | Partly Cloudy |
| May 7 | 53°F12°C | 77°F25°C | 5 mph8 km/h from Southwest | Mostly Clear | Clear |
| May 8 | 59°F15°C | 83°F28°C | 5 mph8 km/h from Southwest | Clear | Mostly Clear |
| May 9 | 64°F18°C | 89°F32°C | 5 mph8 km/h from Southwest | Mostly Clear | Clear |
| May 10 | 68°F20°C | 92°F34°C | 5 mph9 km/h from Southwest | Mostly Clear | Partly Cloudy |
| May 11 | 61°F16°C | 82°F28°C | 6 mph10 km/h from Southwest | Partly Cloudy | Mostly Clear |
Yes
Low of 52°F11°C, High of 67°F20°CWind: 6 mph9 km/h
Precipitation: None