No
you don't need a jacket based on the weather in San Jose, CA, USA 1 second ago
70°F21°C & Partly Cloudy
Wind is 10 mph16 km/h from the Northwest, gusting to 17 mph27 km/h
| September 11 | ||||
| 10pm | 67°F20°C | 10 mph16 km/h Northwest | Mostly Clear | |
| 11pm | 65°F19°C | 7 mph11 km/h North | Clear | |
| September 12 | ||||
| 12am | 64°F18°C | 4 mph6 km/h North | Clear | |
| 1am | 63°F17°C | 1 mph1 km/h North | Clear | |
| 2am | 62°F16°C | 2 mph4 km/h Southeast | Clear | |
| 3am | 61°F16°C | 2 mph3 km/h East | Clear | |
| 4am | 60°F16°C | 2 mph3 km/h East | Clear | |
| 5am | 60°F15°C | 2 mph3 km/h West | Mostly Clear | |
| 6am | 59°F15°C | 2 mph3 km/h West | Mostly Clear | |
| 7am | 58°F15°C | 2 mph3 km/h Southwest | Mostly Clear | |
| 8am | 58°F14°C | 2 mph3 km/h South | Mostly Clear | |
| 9am | 57°F14°C | 2 mph3 km/h Southeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 11 | 61°F16°C | 76°F25°C | 4 mph7 km/h from Northwest | Partly Cloudy | Mostly Clear |
| September 12 | 57°F14°C | 81°F27°C | 5 mph8 km/h from Northwest | Clear | Clear |
| September 13 | 57°F14°C | 78°F26°C | 5 mph8 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 14 | 58°F14°C | 80°F27°C | 6 mph10 km/h from Northwest | Mostly Clear | Clear |
| September 15 | 59°F15°C | 89°F32°C | 4 mph6 km/h from Northwest | Clear | Clear |
| September 16 | 64°F18°C | 90°F32°C | 4 mph7 km/h from Northwest | Clear | Clear |
| September 17 | 62°F17°C | 89°F32°C | 4 mph6 km/h from Northwest | Clear | Clear |
Yes
Low of 57°F14°C, High of 82°F28°CWind: 5 mph8 km/h
Precipitation: None