Yes
you do need a jacket based on the weather in Walnut Creek, CA, USA 1 second ago
Why? Because it's not very warm out.
55°F13°C & Clear
Wind is 6 mph9 km/h from the W, gusting to 14 mph23 km/h
| April 27 | ||||
| 1am | 55°F13°C | 6 mph10 km/h W | Clear | |
| 2am | 53°F12°C | 6 mph9 km/h SW | Clear | |
| 3am | 52°F11°C | 5 mph9 km/h SW | Clear | |
| 4am | 50°F10°C | 5 mph8 km/h SW | Mostly Clear | |
| 5am | 49°F10°C | 5 mph8 km/h SW | Mostly Clear | |
| 6am | 48°F9°C | 5 mph7 km/h SW | Mostly Clear | |
| 7am | 47°F9°C | 4 mph7 km/h SW | Mostly Clear | |
| 8am | 47°F8°C | 4 mph7 km/h SW | Mostly Clear | |
| 9am | 47°F8°C | 4 mph7 km/h SW | Mostly Clear | |
| 10am | 48°F9°C | 4 mph6 km/h SW | Mostly Clear | |
| 11am | 51°F11°C | 4 mph7 km/h SW | Mostly Clear | |
| 12pm | 55°F13°C | 5 mph7 km/h SW | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 26 | 52°F11°C | 67°F20°C | 7 mph12 km/h from W | Mostly Clear | Mostly Clear |
| April 27 | 47°F8°C | 71°F21°C | 7 mph12 km/h from SW | Mostly Clear | Mostly Clear |
| April 28 | 48°F9°C | 74°F23°C | 9 mph14 km/h from W | Clear | Mostly Clear |
| April 29 | 47°F8°C | 73°F23°C | 7 mph12 km/h from W | Clear | Clear |
| April 30 | 46°F8°C | 75°F24°C | 6 mph10 km/h from W | Clear | Clear |
| May 1 | 47°F8°C | 78°F25°C | 7 mph12 km/h from N | Clear | Mostly Clear |
| May 2 | 51°F10°C | 81°F27°C | 7 mph11 km/h from N | Mostly Clear | Mostly Clear |
Yes
Low of 46°F8°C, High of 71°F22°CWind: 7 mph12 km/h
Precipitation: None