Yes
you do need a jacket based on the weather in Sunnyvale, CA 94087, USA 1 second ago
Why? Because it's quite chilly.
50°F10°C & Partly Cloudy
Wind is 2 mph3 km/h from the W, gusting to 4 mph6 km/h
| April 20 | ||||
| 8am | 50°F10°C | 2 mph3 km/h W | Mostly Cloudy | |
| 9am | 50°F10°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 10am | 51°F11°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 11am | 54°F12°C | 1 mph2 km/h SW | Mostly Cloudy | |
| 12pm | 58°F15°C | 1 mph2 km/h SW | Partly Cloudy | |
| 1pm | 63°F17°C | 2 mph3 km/h NW | Mostly Clear | |
| 2pm | 67°F20°C | 3 mph5 km/h NW | Clear | |
| 3pm | 71°F22°C | 5 mph8 km/h NW | Clear | |
| 4pm | 73°F23°C | 7 mph11 km/h NW | Clear | |
| 5pm | 75°F24°C | 8 mph13 km/h NW | Clear | |
| 6pm | 75°F24°C | 9 mph14 km/h NW | Clear | |
| 7pm | 75°F24°C | 9 mph15 km/h NW | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 20 | 50°F10°C | 75°F24°C | 5 mph9 km/h from NW | Mostly Clear | Mostly Clear |
| April 21 | 50°F10°C | 78°F25°C | 4 mph7 km/h from NW | Clear | Clear |
| April 22 | 55°F13°C | 79°F26°C | 4 mph6 km/h from SW | Mostly Clear | Mostly Clear |
| April 23 | 52°F11°C | 70°F21°C | 7 mph11 km/h from S | Partly Cloudy | Partly Cloudy |
| April 24 | 51°F11°C | 72°F22°C | 5 mph7 km/h from SW | Partly Cloudy | Partly Cloudy |
| April 25 | 50°F10°C | 70°F21°C | 8 mph12 km/h from W | Partly Cloudy | Mostly Cloudy |
| April 26 | 53°F11°C | 65°F18°C | 10 mph16 km/h from NW | Partly Cloudy | Partly Cloudy |
Yes
Low of 50°F10°C, High of 78°F26°CWind: 4 mph7 km/h
Precipitation: None