No
you don't need a jacket based on the weather in San Francisco, CA, USA 8 minutes ago
69°F20°C & Partly Cloudy
Wind is 11 mph18 km/h from the West, gusting to 17 mph28 km/h
| September 21 | ||||
| 8pm | 68°F20°C | 12 mph19 km/h West | Clear | |
| 9pm | 68°F20°C | 10 mph16 km/h West | Clear | |
| 10pm | 65°F18°C | 9 mph14 km/h West | Clear | |
| 11pm | 63°F17°C | 5 mph8 km/h Southwest | Clear | |
| September 22 | ||||
| 12am | 62°F17°C | 4 mph6 km/h Southwest | Clear | |
| 1am | 61°F16°C | 4 mph7 km/h South | Clear | |
| 2am | 61°F16°C | 4 mph7 km/h South | Clear | |
| 3am | 61°F16°C | 5 mph7 km/h Southwest | Clear | |
| 4am | 60°F16°C | 4 mph7 km/h Southwest | Clear | |
| 5am | 59°F15°C | 4 mph7 km/h Southwest | Mostly Clear | |
| 6am | 59°F15°C | 4 mph6 km/h Southwest | Mostly Clear | |
| 7am | 58°F15°C | 4 mph6 km/h Southwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 21 | 58°F14°C | 71°F22°C | 6 mph10 km/h from West | Partly Cloudy | Mostly Clear |
| September 22 | 58°F14°C | 73°F23°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 23 | 57°F14°C | 82°F28°C | 4 mph7 km/h from West | Mostly Clear | Partly Cloudy |
| September 24 | 62°F16°C | 72°F22°C | 5 mph9 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| September 25 | 60°F16°C | 70°F21°C | 7 mph12 km/h from West | Mostly Cloudy | Partly Cloudy |
| September 26 | 59°F15°C | 70°F21°C | 6 mph10 km/h from Southwest | Mostly Clear | Clear |
| September 27 | 57°F14°C | 71°F21°C | 7 mph11 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 58°F15°C, High of 73°F23°CWind: 5 mph9 km/h
Precipitation: None