No
you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
72°F22°C & Clear
Wind is 4 mph7 km/h from the Southwest, gusting to 9 mph15 km/h
| May 7 | ||||
| 3pm | 72°F22°C | 4 mph7 km/h Southwest | Clear | |
| 4pm | 75°F24°C | 7 mph11 km/h Southwest | Clear | |
| 5pm | 76°F25°C | 9 mph14 km/h West | Clear | |
| 6pm | 77°F25°C | 10 mph16 km/h West | Clear | |
| 7pm | 77°F25°C | 12 mph19 km/h West | Clear | |
| 8pm | 75°F24°C | 12 mph19 km/h West | Clear | |
| 9pm | 73°F23°C | 11 mph17 km/h West | Clear | |
| 10pm | 70°F21°C | 7 mph12 km/h West | Clear | |
| 11pm | 67°F19°C | 5 mph8 km/h Southwest | Clear | |
| May 8 | ||||
| 12am | 65°F18°C | 2 mph4 km/h Southwest | Clear | |
| 1am | 62°F17°C | 2 mph3 km/h Southwest | Clear | |
| 2am | 61°F16°C | 2 mph2 km/h Northwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 7 | 53°F12°C | 77°F25°C | 7 mph11 km/h from West | Clear | Clear |
| May 8 | 58°F14°C | 84°F29°C | 5 mph8 km/h from Southwest | Clear | Clear |
| May 9 | 66°F19°C | 93°F34°C | 5 mph7 km/h from Southwest | Clear | Clear |
| May 10 | 71°F22°C | 95°F35°C | 6 mph9 km/h from Southwest | Clear | Partly Cloudy |
| May 11 | 64°F18°C | 86°F30°C | 6 mph10 km/h from Southwest | Mostly Clear | Mostly Clear |
| May 12 | 52°F11°C | 69°F21°C | 8 mph14 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| May 13 | 49°F9°C | 64°F18°C | 7 mph12 km/h from Southwest | Partly Cloudy | Mostly Clear |
Yes
Low of 58°F15°C, High of 83°F29°CWind: 5 mph8 km/h
Precipitation: None