No
you don't need a jacket based on the weather in Cupertino, CA, USA 2 minutes ago
80°F26°C & Cloudy
Wind is 6 mph9 km/h from the North, gusting to 9 mph14 km/h
| September 18 | ||||
| 5pm | 81°F27°C | 6 mph10 km/h North | Cloudy | |
| 6pm | 80°F27°C | 7 mph12 km/h North | Cloudy | |
| 7pm | 76°F25°C | 6 mph9 km/h North | Cloudy | |
| 8pm | 74°F23°C | 5 mph8 km/h Northwest | Cloudy | |
| 9pm | 72°F22°C | 4 mph7 km/h North | Cloudy | |
| 10pm | 70°F21°C | 4 mph6 km/h North | Cloudy | |
| 11pm | 70°F21°C | 3 mph5 km/h Northwest | Cloudy | |
| September 19 | ||||
| 12am | 68°F20°C | 3 mph4 km/h North | Cloudy | |
| 1am | 68°F20°C | 2 mph3 km/h West | Cloudy | |
| 2am | 67°F20°C | 3 mph4 km/h East | Cloudy | |
| 3am | 67°F19°C | 2 mph4 km/h South | Cloudy | |
| 4am | 66°F19°C | 3 mph4 km/h Northwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 63°F17°C | 81°F27°C | 4 mph6 km/h from North | Mostly Cloudy | Cloudy |
| September 19 | 63°F17°C | 80°F27°C | 3 mph5 km/h from Northwest | Mostly Clear | Mostly Clear |
| September 20 | 59°F15°C | 80°F27°C | 4 mph7 km/h from Northwest | Mostly Clear | Clear |
| September 21 | 57°F14°C | 80°F27°C | 5 mph7 km/h from Northwest | Clear | Clear |
| September 22 | 60°F16°C | 89°F32°C | 3 mph5 km/h from North | Clear | Mostly Clear |
| September 23 | 66°F19°C | 85°F29°C | 3 mph5 km/h from Southwest | Mostly Clear | Partly Cloudy |
| September 24 | 62°F16°C | 80°F27°C | 4 mph7 km/h from Northwest | Mostly Clear | Mostly Clear |
No
Low of 64°F18°C, High of 80°F27°CWind: 3 mph5 km/h
Precipitation: 27% rain