Yes
you do need a jacket based on the weather in Sunnyvale, CA 94086, USA 1 second ago
Why? Because it's pretty chilly!
56°F13°C & Mostly Clear
Wind is 2 mph3 km/h from the Southwest, gusting to 6 mph9 km/h
| May 21 | ||||
| 3am | 55°F13°C | 3 mph4 km/h Southwest | Clear | |
| 4am | 54°F12°C | 3 mph5 km/h Southwest | Clear | |
| 5am | 53°F11°C | 2 mph4 km/h Southwest | Clear | |
| 6am | 51°F11°C | 2 mph4 km/h Southwest | Clear | |
| 7am | 51°F10°C | 2 mph4 km/h West | Clear | |
| 8am | 50°F10°C | 2 mph2 km/h West | Clear | |
| 9am | 49°F9°C | 2 mph4 km/h West | Clear | |
| 10am | 51°F11°C | 2 mph3 km/h Southwest | Clear | |
| 11am | 56°F13°C | 1 mph2 km/h Southwest | Clear | |
| 12pm | 60°F16°C | 2 mph3 km/h North | Clear | |
| 1pm | 65°F19°C | 3 mph4 km/h Northwest | Clear | |
| 2pm | 70°F21°C | 4 mph6 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 20 | 53°F12°C | 77°F25°C | 4 mph6 km/h from North | Clear | Clear |
| May 21 | 49°F9°C | 81°F27°C | 6 mph9 km/h from Northwest | Clear | Clear |
| May 22 | 51°F10°C | 74°F23°C | 8 mph12 km/h from Northwest | Clear | Mostly Clear |
| May 23 | 49°F9°C | 69°F20°C | 7 mph12 km/h from West | Mostly Clear | Mostly Clear |
| May 24 | 49°F10°C | 74°F23°C | 5 mph8 km/h from Northwest | Clear | Clear |
| May 25 | 50°F10°C | 73°F23°C | 6 mph9 km/h from Northwest | Mostly Clear | Partly Cloudy |
| May 26 | 52°F11°C | 73°F23°C | 6 mph10 km/h from Northwest | Partly Cloudy | Partly Cloudy |
Yes
Low of 49°F10°C, High of 82°F28°CWind: 6 mph9 km/h
Precipitation: None