No
you don't need a jacket based on the weather in Cupertino, CA, USA 5 minutes ago
89°F32°C & Mostly Cloudy
Wind is 6 mph10 km/h from the North, gusting to 9 mph15 km/h
| September 17 | ||||
| 6pm | 90°F32°C | 7 mph11 km/h North | Mostly Clear | |
| 7pm | 89°F32°C | 7 mph12 km/h North | Mostly Clear | |
| 8pm | 87°F30°C | 7 mph12 km/h North | Cloudy | |
| 9pm | 83°F28°C | 5 mph8 km/h North | Cloudy | |
| 10pm | 79°F26°C | 4 mph6 km/h North | Cloudy | |
| 11pm | 76°F24°C | 2 mph4 km/h North | Mostly Cloudy | |
| September 18 | ||||
| 12am | 74°F23°C | 2 mph3 km/h South | Cloudy | |
| 1am | 72°F22°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 2am | 71°F22°C | 2 mph4 km/h South | Mostly Cloudy | |
| 3am | 71°F22°C | 2 mph4 km/h South | Mostly Cloudy | |
| 4am | 70°F21°C | 2 mph4 km/h South | Mostly Cloudy | |
| 5am | 69°F21°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 58°F14°C | 90°F32°C | 4 mph6 km/h from North | Mostly Clear | Mostly Cloudy |
| September 18 | 63°F17°C | 81°F27°C | 3 mph5 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| September 19 | 62°F17°C | 78°F25°C | 3 mph4 km/h from West | Mostly Clear | Mostly Clear |
| September 20 | 59°F15°C | 80°F27°C | 4 mph7 km/h from Northwest | Mostly Clear | Clear |
| September 21 | 59°F15°C | 82°F28°C | 4 mph7 km/h from Northwest | Clear | Clear |
| September 22 | 60°F16°C | 88°F31°C | 3 mph5 km/h from North | Clear | Mostly Clear |
| September 23 | 64°F18°C | 79°F26°C | 3 mph6 km/h from West | Partly Cloudy | Mostly Clear |
No
Low of 64°F18°C, High of 81°F27°CWind: 3 mph5 km/h
Precipitation: None