Yes
you do need a jacket based on the weather in San Francisco, CA 94117, USA 1 second ago
Why? Because it's pretty chilly and it's fairly windy outside!
57°F14°C & Mostly Cloudy
Wind is 11 mph17 km/h from the West, gusting to 20 mph32 km/h
| August 12 | ||||
| 2am | 57°F14°C | 10 mph17 km/h West | Cloudy | |
| 3am | 57°F14°C | 10 mph16 km/h West | Cloudy | |
| 4am | 57°F14°C | 10 mph16 km/h West | Cloudy | |
| 5am | 58°F14°C | 10 mph15 km/h West | Cloudy | |
| 6am | 58°F15°C | 9 mph15 km/h West | Haze | |
| 7am | 58°F14°C | 9 mph14 km/h West | Haze | |
| 8am | 56°F13°C | 8 mph13 km/h West | Cloudy | |
| 9am | 56°F13°C | 8 mph13 km/h West | Cloudy | |
| 10am | 56°F13°C | 8 mph13 km/h West | Cloudy | |
| 11am | 57°F14°C | 8 mph12 km/h West | Cloudy | |
| 12pm | 58°F14°C | 7 mph12 km/h West | Mostly Cloudy | |
| 1pm | 60°F15°C | 8 mph13 km/h West | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| August 11 | 56°F13°C | 65°F18°C | 7 mph11 km/h from West | Mostly Cloudy | Cloudy |
| August 12 | 56°F13°C | 65°F18°C | 10 mph16 km/h from West | Mostly Cloudy | Mostly Cloudy |
| August 13 | 56°F13°C | 65°F18°C | 9 mph15 km/h from West | Mostly Cloudy | Cloudy |
| August 14 | 56°F13°C | 65°F18°C | 8 mph12 km/h from Southwest | Partly Cloudy | Mostly Clear |
| August 15 | 56°F13°C | 71°F22°C | 7 mph12 km/h from West | Mostly Clear | Partly Cloudy |
| August 16 | 60°F15°C | 70°F21°C | 10 mph16 km/h from Southwest | Mostly Cloudy | Cloudy |
| August 17 | 60°F15°C | 68°F20°C | 10 mph16 km/h from West | Mostly Cloudy | Partly Cloudy |
Yes
Low of 56°F14°C, High of 65°F19°CWind: 10 mph16 km/h
Precipitation: None