Yes
you do need a jacket based on the weather in San Francisco, CA, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
51°F11°C & Mostly Clear
Wind is 2 mph4 km/h from the SW, gusting to 4 mph7 km/h
| April 18 | ||||
| 9am | 51°F11°C | 3 mph4 km/h SW | Clear | |
| 10am | 52°F11°C | 3 mph4 km/h SW | Mostly Clear | |
| 11am | 54°F12°C | 2 mph3 km/h SW | Mostly Clear | |
| 12pm | 57°F14°C | 1 mph2 km/h SE | Mostly Clear | |
| 1pm | 61°F16°C | 1 mph2 km/h SE | Mostly Clear | |
| 2pm | 65°F18°C | 2 mph3 km/h E | Mostly Clear | |
| 3pm | 68°F20°C | 2 mph3 km/h W | Partly Cloudy | |
| 4pm | 69°F21°C | 4 mph7 km/h W | Mostly Cloudy | |
| 5pm | 68°F20°C | 8 mph12 km/h W | Mostly Cloudy | |
| 6pm | 66°F19°C | 10 mph16 km/h W | Mostly Cloudy | |
| 7pm | 64°F18°C | 11 mph17 km/h W | Mostly Cloudy | |
| 8pm | 62°F17°C | 10 mph16 km/h W | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 18 | 51°F11°C | 69°F21°C | 5 mph9 km/h from SW | Partly Cloudy | Mostly Cloudy |
| April 19 | 52°F11°C | 62°F17°C | 9 mph15 km/h from SW | Mostly Clear | Partly Cloudy |
| April 20 | 52°F11°C | 65°F18°C | 10 mph17 km/h from W | Mostly Clear | Mostly Clear |
| April 21 | 51°F11°C | 67°F19°C | 6 mph9 km/h from W | Mostly Clear | Partly Cloudy |
| April 22 | 52°F11°C | 65°F18°C | 9 mph14 km/h from SW | Mostly Clear | Partly Cloudy |
| April 23 | 52°F11°C | 60°F15°C | 12 mph20 km/h from SW | Mostly Cloudy | Mostly Cloudy |
| April 24 | 52°F11°C | 59°F15°C | 9 mph15 km/h from SW | Rain | Mostly Cloudy |
Yes
Low of 52°F11°C, High of 62°F17°CWind: 9 mph15 km/h
Precipitation: None