Yes
you do need a jacket based on the weather in San Francisco, CA, USA 9 seconds ago
Why? Because it's pretty chilly!
52°F11°C & Partly Cloudy
Wind is 5 mph8 km/h from the West, gusting to 11 mph18 km/h
| January 11 | ||||
| 12am | 51°F11°C | 5 mph8 km/h West | Mostly Clear | |
| 1am | 50°F10°C | 4 mph6 km/h West | Mostly Clear | |
| 2am | 50°F10°C | 3 mph5 km/h West | Mostly Clear | |
| 3am | 49°F9°C | 4 mph6 km/h North | Partly Cloudy | |
| 4am | 49°F9°C | 5 mph8 km/h Northeast | Mostly Cloudy | |
| 5am | 49°F9°C | 5 mph7 km/h North | Mostly Cloudy | |
| 6am | 48°F9°C | 5 mph8 km/h North | Partly Cloudy | |
| 7am | 47°F8°C | 6 mph9 km/h North | Mostly Clear | |
| 8am | 46°F8°C | 5 mph8 km/h North | Mostly Clear | |
| 9am | 46°F8°C | 6 mph9 km/h North | Clear | |
| 10am | 46°F8°C | 6 mph10 km/h North | Mostly Clear | |
| 11am | 46°F8°C | 7 mph11 km/h North | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 10 | 49°F9°C | 63°F17°C | 3 mph5 km/h from West | Clear | Mostly Clear |
| January 11 | 46°F8°C | 62°F17°C | 10 mph17 km/h from North | Clear | Clear |
| January 12 | 46°F8°C | 59°F15°C | 4 mph6 km/h from Northwest | Clear | Clear |
| January 13 | 43°F6°C | 58°F15°C | 10 mph17 km/h from Northeast | Clear | Clear |
| January 14 | 42°F6°C | 60°F16°C | 4 mph7 km/h from Northeast | Clear | Clear |
| January 15 | 44°F7°C | 60°F15°C | 6 mph10 km/h from Northeast | Clear | Clear |
| January 16 | 43°F6°C | 59°F15°C | 5 mph8 km/h from North | Mostly Clear | Mostly Clear |
Yes
Low of 46°F8°C, High of 63°F17°CWind: 10 mph17 km/h
Precipitation: None