Yes
you do need a jacket based on the weather in Walnut Creek, CA, USA 1 second ago
Why? Because it's quite chilly!
45°F7°C & Partly Cloudy
Wind is 3 mph5 km/h from the Southwest, gusting to 6 mph9 km/h
| December 25 | ||||
| 3am | 45°F7°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 4am | 44°F7°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 5am | 43°F6°C | 3 mph4 km/h Southwest | Mostly Clear | |
| 6am | 42°F6°C | 2 mph4 km/h Southwest | Mostly Clear | |
| 7am | 42°F5°C | 3 mph4 km/h South | Mostly Clear | |
| 8am | 41°F5°C | 2 mph3 km/h Southwest | Mostly Clear | |
| 9am | 40°F5°C | 2 mph4 km/h Southwest | Mostly Clear | |
| 10am | 40°F5°C | 3 mph4 km/h Southwest | Partly Cloudy | |
| 11am | 42°F5°C | 2 mph4 km/h South | Partly Cloudy | |
| 12pm | 45°F7°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 1pm | 49°F9°C | 3 mph4 km/h Southwest | Mostly Cloudy | |
| 2pm | 51°F11°C | 2 mph4 km/h West | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 24 | 45°F7°C | 60°F15°C | 4 mph7 km/h from Southwest | Rain | Mostly Clear |
| December 25 | 40°F5°C | 55°F13°C | 3 mph5 km/h from Southwest | Mostly Cloudy | Drizzle |
| December 26 | 47°F8°C | 58°F15°C | 5 mph9 km/h from South | Drizzle | Rain |
| December 27 | 51°F11°C | 61°F16°C | 5 mph9 km/h from Southwest | Drizzle | Cloudy |
| December 28 | 54°F12°C | 61°F16°C | 5 mph9 km/h from Southwest | Cloudy | Rain |
| December 29 | 43°F6°C | 58°F15°C | 10 mph16 km/h from Southwest | Rain | Clear |
| December 30 | 40°F4°C | 55°F13°C | 3 mph5 km/h from Northwest | Mostly Clear | Mostly Clear |
Yes
Low of 40°F5°C, High of 55°F13°CWind: 3 mph5 km/h
Precipitation: None