Yes
you do need a jacket based on the weather in San Jose, CA, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool!
58°F14°C & Cloudy
Wind is 2 mph4 km/h from the Southeast, gusting to 6 mph10 km/h
| December 22 | ||||
| 12am | 58°F14°C | 3 mph5 km/h Southeast | Cloudy | |
| 1am | 57°F14°C | 3 mph5 km/h South | Cloudy | |
| 2am | 57°F14°C | 3 mph5 km/h South | Cloudy | |
| 3am | 57°F14°C | 3 mph4 km/h Southeast | Cloudy | |
| 4am | 56°F14°C | 3 mph5 km/h South | Drizzle | |
| 5am | 56°F13°C | 3 mph5 km/h Southeast | Cloudy | |
| 6am | 56°F13°C | 2 mph4 km/h Southeast | Cloudy | |
| 7am | 55°F13°C | 3 mph4 km/h South | Cloudy | |
| 8am | 55°F13°C | 3 mph6 km/h Southeast | Cloudy | |
| 9am | 55°F13°C | 3 mph5 km/h Southeast | Cloudy | |
| 10am | 56°F13°C | 3 mph6 km/h Southeast | Cloudy | |
| 11am | 56°F13°C | 3 mph5 km/h Southeast | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 21 | 49°F9°C | 63°F17°C | 4 mph6 km/h from Southeast | Cloudy | Drizzle |
| December 22 | 55°F13°C | 67°F19°C | 4 mph7 km/h from Southeast | Mostly Cloudy | Cloudy |
| December 23 | 56°F13°C | 67°F20°C | 4 mph6 km/h from Southeast | Cloudy | Heavy Rain |
| December 24 | 49°F9°C | 60°F16°C | 6 mph10 km/h from West | Rain | Partly Cloudy |
| December 25 | 43°F6°C | 56°F13°C | 2 mph4 km/h from Northwest | Mostly Cloudy | Cloudy |
| December 26 | 47°F8°C | 60°F16°C | 5 mph8 km/h from Southeast | Drizzle | Cloudy |
| December 27 | 50°F10°C | 58°F14°C | 5 mph8 km/h from Southeast | Rain | Cloudy |
Yes
Low of 55°F13°C, High of 67°F20°CWind: 4 mph7 km/h
Precipitation: None