Yes
you do need a jacket based on the weather in San Francisco (Potrero Hill), California, United States 1 second ago
Why? Because it's pretty chilly.
53°F12°C & Partly Cloudy
Wind is 9 mph15 km/h from the SW, gusting to 16 mph26 km/h
| May 17 | ||||
| 7am | 53°F12°C | 9 mph15 km/h SW | Cloudy | |
| 8am | 53°F12°C | 9 mph14 km/h SW | Cloudy | |
| 9am | 54°F12°C | 8 mph14 km/h SW | Cloudy | |
| 10am | 54°F12°C | 8 mph13 km/h SW | Cloudy | |
| 11am | 55°F13°C | 8 mph13 km/h SW | Mostly Cloudy | |
| 12pm | 56°F13°C | 7 mph12 km/h SW | Mostly Cloudy | |
| 1pm | 57°F14°C | 6 mph10 km/h SW | Mostly Cloudy | |
| 2pm | 60°F15°C | 6 mph9 km/h SW | Partly Cloudy | |
| 3pm | 62°F17°C | 6 mph9 km/h SW | Partly Cloudy | |
| 4pm | 64°F18°C | 8 mph12 km/h SW | Mostly Clear | |
| 5pm | 65°F19°C | 10 mph15 km/h SW | Mostly Clear | |
| 6pm | 66°F19°C | 11 mph17 km/h SW | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 17 | 53°F11°C | 66°F19°C | 9 mph14 km/h from SW | Partly Cloudy | Partly Cloudy |
| May 18 | 53°F11°C | 66°F19°C | 11 mph18 km/h from SW | Mostly Clear | Mostly Clear |
| May 19 | 52°F11°C | 67°F20°C | 9 mph15 km/h from SW | Mostly Clear | Mostly Clear |
| May 20 | 51°F10°C | 68°F20°C | 8 mph13 km/h from SW | Clear | Clear |
| May 21 | 52°F11°C | 69°F21°C | 8 mph12 km/h from SW | Clear | Mostly Clear |
| May 22 | 52°F11°C | 68°F20°C | 10 mph17 km/h from W | Clear | Partly Cloudy |
| May 23 | 51°F11°C | 66°F19°C | 10 mph16 km/h from SW | Partly Cloudy | Partly Cloudy |
Yes
Low of 53°F12°C, High of 66°F19°CWind: 11 mph18 km/h
Precipitation: None