No
you don't need a jacket based on the weather in San Jose, CA, USA 5 minutes ago
65°F18°C & Clear
Wind is 2 mph3 km/h from the Northwest, gusting to 4 mph6 km/h
| September 17 | ||||
| 7am | 64°F18°C | 2 mph3 km/h West | Mostly Clear | |
| 8am | 63°F17°C | 1 mph2 km/h North | Mostly Clear | |
| 9am | 62°F17°C | 1 mph2 km/h North | Partly Cloudy | |
| 10am | 61°F16°C | 1 mph2 km/h North | Partly Cloudy | |
| 11am | 62°F17°C | 1 mph2 km/h North | Partly Cloudy | |
| 12pm | 66°F19°C | 2 mph3 km/h Northwest | Clear | |
| 1pm | 71°F21°C | 3 mph4 km/h Northwest | Clear | |
| 2pm | 76°F25°C | 3 mph5 km/h Northwest | Clear | |
| 3pm | 81°F27°C | 4 mph6 km/h Northwest | Clear | |
| 4pm | 85°F30°C | 5 mph8 km/h Northwest | Clear | |
| 5pm | 88°F31°C | 6 mph10 km/h Northwest | Clear | |
| 6pm | 90°F32°C | 7 mph12 km/h Northwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 61°F16°C | 90°F32°C | 5 mph7 km/h from Northwest | Mostly Clear | Mostly Cloudy |
| September 18 | 65°F18°C | 78°F26°C | 3 mph5 km/h from Southwest | Cloudy | Mostly Cloudy |
| September 19 | 63°F17°C | 80°F26°C | 3 mph5 km/h from West | Partly Cloudy | Mostly Clear |
| September 20 | 59°F15°C | 82°F28°C | 4 mph7 km/h from Northwest | Mostly Clear | Clear |
| September 21 | 59°F15°C | 85°F29°C | 4 mph7 km/h from Northwest | Clear | Clear |
| September 22 | 62°F17°C | 91°F33°C | 3 mph5 km/h from Northwest | Mostly Clear | Partly Cloudy |
| September 23 | 65°F19°C | 81°F27°C | 4 mph7 km/h from West | Drizzle | Mostly Clear |
No
Low of 65°F19°C, High of 78°F26°CWind: 3 mph5 km/h
Precipitation: 27% rain