Yes
you do need a jacket based on the weather in Sunnyvale, CA, USA 1 second ago
Why? Because it's not very warm out.
58°F14°C & Mostly Cloudy
Wind is 2 mph3 km/h from the NW, gusting to 6 mph10 km/h
| April 19 | ||||
| 2am | 58°F14°C | 2 mph4 km/h NW | Mostly Cloudy | |
| 3am | 56°F14°C | 2 mph3 km/h W | Mostly Cloudy | |
| 4am | 56°F13°C | 2 mph3 km/h W | Mostly Cloudy | |
| 5am | 54°F12°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 6am | 53°F12°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 7am | 53°F11°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 8am | 52°F11°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 9am | 51°F11°C | 2 mph4 km/h SW | Mostly Cloudy | |
| 10am | 52°F11°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 11am | 54°F12°C | 2 mph3 km/h SW | Partly Cloudy | |
| 12pm | 57°F14°C | 1 mph2 km/h SW | Partly Cloudy | |
| 1pm | 61°F16°C | 2 mph3 km/h NW | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 18 | 52°F11°C | 78°F26°C | 3 mph5 km/h from N | Partly Cloudy | Mostly Cloudy |
| April 19 | 51°F11°C | 75°F24°C | 4 mph7 km/h from NW | Mostly Clear | Mostly Clear |
| April 20 | 50°F10°C | 75°F24°C | 6 mph9 km/h from NW | Clear | Clear |
| April 21 | 51°F11°C | 77°F25°C | 4 mph7 km/h from NW | Clear | Mostly Clear |
| April 22 | 55°F13°C | 77°F25°C | 4 mph7 km/h from NW | Mostly Clear | Partly Cloudy |
| April 23 | 53°F12°C | 71°F22°C | 7 mph11 km/h from S | Mostly Cloudy | Mostly Cloudy |
| April 24 | 53°F11°C | 67°F20°C | 5 mph9 km/h from SW | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 52°F11°C, High of 74°F24°CWind: 4 mph7 km/h
Precipitation: None