No
you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
63°F17°C & Clear
Wind is 4 mph6 km/h from the West, gusting to 11 mph17 km/h
| May 3 | ||||
| 12am | 62°F17°C | 4 mph7 km/h West | Clear | |
| 1am | 59°F15°C | 4 mph7 km/h West | Mostly Clear | |
| 2am | 57°F14°C | 4 mph7 km/h West | Mostly Clear | |
| 3am | 56°F13°C | 4 mph7 km/h West | Mostly Clear | |
| 4am | 55°F13°C | 3 mph5 km/h West | Mostly Clear | |
| 5am | 55°F13°C | 2 mph4 km/h West | Partly Cloudy | |
| 6am | 55°F13°C | 3 mph4 km/h West | Mostly Cloudy | |
| 7am | 55°F13°C | 2 mph4 km/h West | Partly Cloudy | |
| 8am | 54°F12°C | 1 mph2 km/h Southwest | Mostly Cloudy | |
| 9am | 54°F12°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 10am | 55°F13°C | 2 mph3 km/h Southwest | Cloudy | |
| 11am | 56°F13°C | 2 mph3 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 2 | 54°F12°C | 73°F23°C | 5 mph8 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| May 3 | 54°F12°C | 69°F20°C | 6 mph9 km/h from Southwest | Mostly Cloudy | Cloudy |
| May 4 | 51°F11°C | 60°F15°C | 5 mph8 km/h from Southwest | Cloudy | Cloudy |
| May 5 | 51°F11°C | 64°F18°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Partly Cloudy |
| May 6 | 52°F11°C | 70°F21°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| May 7 | 53°F12°C | 79°F26°C | 5 mph9 km/h from Southwest | Clear | Clear |
| May 8 | 59°F15°C | 85°F29°C | 5 mph9 km/h from Southwest | Mostly Clear | Partly Cloudy |
Yes
Low of 54°F12°C, High of 69°F21°CWind: 6 mph9 km/h
Precipitation: None