No
you don't need a jacket based on the weather in Walnut Creek, CA, USA 1 second ago
66°F19°C & Clear
Wind is 9 mph15 km/h from the Southwest, gusting to 14 mph22 km/h
| May 3 | ||||
| 8pm | 66°F19°C | 9 mph15 km/h Southwest | Mostly Clear | |
| 9pm | 65°F18°C | 9 mph15 km/h Southwest | Mostly Clear | |
| 10pm | 62°F17°C | 9 mph14 km/h West | Mostly Clear | |
| 11pm | 59°F15°C | 6 mph10 km/h Southwest | Clear | |
| May 4 | ||||
| 12am | 57°F14°C | 6 mph10 km/h Southwest | Clear | |
| 1am | 55°F13°C | 6 mph10 km/h Southwest | Clear | |
| 2am | 53°F12°C | 6 mph10 km/h Southwest | Mostly Clear | |
| 3am | 52°F11°C | 5 mph9 km/h Southwest | Mostly Clear | |
| 4am | 51°F10°C | 5 mph8 km/h Southwest | Mostly Clear | |
| 5am | 50°F10°C | 5 mph8 km/h Southwest | Clear | |
| 6am | 49°F10°C | 5 mph7 km/h Southwest | Clear | |
| 7am | 48°F9°C | 5 mph8 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 3 | 52°F11°C | 66°F19°C | 8 mph12 km/h from Southwest | Mostly Cloudy | Clear |
| May 4 | 48°F9°C | 73°F23°C | 7 mph11 km/h from West | Clear | Clear |
| May 5 | 56°F13°C | 81°F27°C | 13 mph20 km/h from North | Clear | Clear |
| May 6 | 54°F12°C | 77°F25°C | 7 mph12 km/h from West | Clear | Mostly Clear |
| May 7 | 52°F11°C | 70°F21°C | 9 mph15 km/h from Southwest | Mostly Clear | Partly Cloudy |
| May 8 | 52°F11°C | 78°F25°C | 5 mph9 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| May 9 | 51°F10°C | 83°F28°C | 6 mph10 km/h from Southwest | Clear | Mostly Clear |
Yes
Low of 47°F9°C, High of 73°F23°CWind: 7 mph11 km/h
Precipitation: None