No
you don't need a jacket based on the weather in San Francisco, CA, USA 1 second ago
62°F17°C & Cloudy
Wind is 7 mph11 km/h from the Southwest, gusting to 14 mph23 km/h
| September 18 | ||||
| 12pm | 63°F17°C | 7 mph12 km/h Southwest | Cloudy | |
| 1pm | 65°F18°C | 8 mph14 km/h Southwest | Cloudy | |
| 2pm | 66°F19°C | 10 mph16 km/h Southwest | Cloudy | |
| 3pm | 67°F19°C | 9 mph15 km/h Southwest | Cloudy | |
| 4pm | 67°F20°C | 11 mph17 km/h Southwest | Cloudy | |
| 5pm | 68°F20°C | 11 mph18 km/h Southwest | Cloudy | |
| 6pm | 68°F20°C | 12 mph19 km/h Southwest | Cloudy | |
| 7pm | 68°F20°C | 10 mph17 km/h West | Cloudy | |
| 8pm | 67°F19°C | 10 mph15 km/h West | Cloudy | |
| 9pm | 66°F19°C | 7 mph12 km/h West | Cloudy | |
| 10pm | 64°F18°C | 7 mph12 km/h Southwest | Cloudy | |
| 11pm | 64°F18°C | 8 mph13 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 60°F16°C | 68°F20°C | 9 mph15 km/h from Southwest | Cloudy | Cloudy |
| September 19 | 61°F16°C | 71°F22°C | 5 mph8 km/h from West | Partly Cloudy | Partly Cloudy |
| September 20 | 60°F15°C | 72°F22°C | 6 mph10 km/h from West | Mostly Clear | Partly Cloudy |
| September 21 | 59°F15°C | 71°F22°C | 6 mph10 km/h from West | Mostly Clear | Mostly Clear |
| September 22 | 59°F15°C | 80°F27°C | 4 mph7 km/h from West | Mostly Clear | Mostly Clear |
| September 23 | 60°F16°C | 76°F24°C | 5 mph8 km/h from West | Partly Cloudy | Partly Cloudy |
| September 24 | 61°F16°C | 73°F23°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
No
Low of 61°F16°C, High of 71°F22°CWind: 5 mph8 km/h
Precipitation: 11% rain