Yes
you do need a jacket based on the weather in Sunnyvale, CA 94086, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
56°F13°C & Clear
Wind is 2 mph3 km/h from the W, gusting to 4 mph6 km/h
| May 11 | ||||
| 10am | 57°F14°C | 2 mph3 km/h W | Clear | |
| 11am | 60°F16°C | 1 mph2 km/h W | Clear | |
| 12pm | 65°F18°C | 2 mph3 km/h NW | Clear | |
| 1pm | 69°F20°C | 2 mph4 km/h NW | Clear | |
| 2pm | 73°F23°C | 3 mph5 km/h NW | Clear | |
| 3pm | 77°F25°C | 5 mph8 km/h NW | Clear | |
| 4pm | 80°F27°C | 6 mph10 km/h NW | Clear | |
| 5pm | 82°F28°C | 8 mph13 km/h NW | Clear | |
| 6pm | 83°F28°C | 9 mph15 km/h NW | Clear | |
| 7pm | 82°F28°C | 10 mph15 km/h NW | Clear | |
| 8pm | 80°F27°C | 9 mph15 km/h NW | Clear | |
| 9pm | 77°F25°C | 8 mph13 km/h NW | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 11 | 56°F13°C | 83°F28°C | 6 mph9 km/h from NW | Clear | Clear |
| May 12 | 55°F13°C | 82°F28°C | 6 mph9 km/h from NW | Clear | Clear |
| May 13 | 53°F12°C | 77°F25°C | 6 mph9 km/h from NW | Clear | Clear |
| May 14 | 53°F11°C | 78°F26°C | 5 mph8 km/h from NW | Mostly Clear | Mostly Clear |
| May 15 | 54°F12°C | 80°F27°C | 5 mph8 km/h from NW | Clear | Clear |
| May 16 | 55°F13°C | 80°F27°C | 4 mph6 km/h from W | Clear | Mostly Clear |
| May 17 | 54°F12°C | 77°F25°C | 6 mph9 km/h from W | Clear | Partly Cloudy |
Yes
Low of 55°F13°C, High of 82°F28°CWind: 6 mph9 km/h
Precipitation: None