No
you don't need a jacket based on the weather in San Francisco, CA, USA 2 minutes ago
76°F25°C & Clear
Wind is 9 mph15 km/h from the West, gusting to 14 mph23 km/h
| September 15 | ||||
| 7pm | 76°F24°C | 10 mph16 km/h West | Clear | |
| 8pm | 73°F23°C | 11 mph17 km/h West | Clear | |
| 9pm | 71°F22°C | 10 mph17 km/h West | Clear | |
| 10pm | 68°F20°C | 8 mph14 km/h West | Clear | |
| 11pm | 67°F19°C | 4 mph6 km/h Southwest | Clear | |
| September 16 | ||||
| 12am | 66°F19°C | 3 mph4 km/h Southwest | Clear | |
| 1am | 65°F18°C | 3 mph5 km/h Southwest | Clear | |
| 2am | 63°F17°C | 3 mph5 km/h Southwest | Clear | |
| 3am | 62°F17°C | 3 mph5 km/h Southwest | Clear | |
| 4am | 61°F16°C | 3 mph5 km/h Southwest | Clear | |
| 5am | 61°F16°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 6am | 60°F15°C | 3 mph5 km/h Southwest | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 15 | 58°F15°C | 80°F27°C | 5 mph8 km/h from West | Clear | Mostly Clear |
| September 16 | 59°F15°C | 75°F24°C | 5 mph8 km/h from West | Mostly Clear | Partly Cloudy |
| September 17 | 58°F14°C | 73°F23°C | 5 mph9 km/h from West | Partly Cloudy | Mostly Cloudy |
| September 18 | 61°F16°C | 68°F20°C | 7 mph12 km/h from Southwest | Mostly Cloudy | Cloudy |
| September 19 | 61°F16°C | 71°F22°C | 6 mph9 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| September 20 | 61°F16°C | 71°F22°C | 6 mph9 km/h from West | Mostly Clear | Mostly Clear |
| September 21 | 59°F15°C | 71°F21°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
Yes
Low of 58°F15°C, High of 75°F24°CWind: 5 mph8 km/h
Precipitation: None