No
you don't need a jacket based on the weather in San Jose, CA, USA 1 minute ago
69°F21°C & Partly Cloudy
Wind is 6 mph9 km/h from the Northwest, gusting to 11 mph17 km/h
| September 9 | ||||
| 11pm | 69°F20°C | 6 mph9 km/h Northwest | Partly Cloudy | |
| September 10 | ||||
| 12am | 67°F20°C | 5 mph8 km/h North | Mostly Clear | |
| 1am | 66°F19°C | 5 mph8 km/h North | Mostly Clear | |
| 2am | 65°F18°C | 4 mph6 km/h Northwest | Partly Cloudy | |
| 3am | 64°F18°C | 3 mph5 km/h Northwest | Mostly Cloudy | |
| 4am | 64°F18°C | 2 mph4 km/h Northwest | Cloudy | |
| 5am | 64°F18°C | 1 mph2 km/h North | Mostly Cloudy | |
| 6am | 63°F17°C | 2 mph3 km/h South | Cloudy | |
| 7am | 62°F17°C | 2 mph2 km/h South | Cloudy | |
| 8am | 62°F17°C | 2 mph3 km/h South | Mostly Cloudy | |
| 9am | 62°F17°C | 2 mph3 km/h Southeast | Mostly Cloudy | |
| 10am | 62°F17°C | 2 mph3 km/h Southeast | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 9 | 64°F18°C | 78°F26°C | 4 mph6 km/h from Northwest | Mostly Cloudy | Mostly Cloudy |
| September 10 | 61°F16°C | 74°F23°C | 4 mph7 km/h from West | Mostly Cloudy | Mostly Cloudy |
| September 11 | 58°F15°C | 76°F24°C | 5 mph8 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 | Clear | Partly Cloudy |
| September 14 | 60°F16°C | 78°F26°C | 5 mph9 km/h from Northwest | Partly Cloudy | Mostly Clear |
| September 15 | 60°F15°C | 82°F28°C | 5 mph8 km/h from Northwest | Clear | Clear |
No
Low of 62°F17°C, High of 74°F24°CWind: 4 mph7 km/h
Precipitation: 19% rain