No
you don't need a jacket based on the weather in San Francisco, CA, USA 28 minutes ago
61°F16°C & Mostly Cloudy
Wind is 4 mph6 km/h from the Southwest, gusting to 10 mph16 km/h
| September 19 | ||||
| 3am | 61°F16°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 4am | 60°F16°C | 4 mph6 km/h Southwest | Cloudy | |
| 5am | 61°F16°C | 3 mph6 km/h Southwest | Cloudy | |
| 6am | 61°F16°C | 4 mph7 km/h Southwest | Cloudy | |
| 7am | 60°F16°C | 5 mph7 km/h West | Cloudy | |
| 8am | 60°F15°C | 5 mph7 km/h Southwest | Cloudy | |
| 9am | 59°F15°C | 4 mph7 km/h Southwest | Mostly Cloudy | |
| 10am | 60°F16°C | 3 mph5 km/h Southwest | Cloudy | |
| 11am | 61°F16°C | 3 mph5 km/h Southwest | Cloudy | |
| 12pm | 62°F17°C | 4 mph6 km/h Southwest | Mostly Cloudy | |
| 1pm | 64°F18°C | 4 mph7 km/h Southwest | Partly Cloudy | |
| 2pm | 67°F19°C | 5 mph8 km/h Southwest | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 60°F15°C | 66°F19°C | 6 mph10 km/h from West | Mostly Cloudy | Cloudy |
| September 19 | 59°F15°C | 71°F22°C | 6 mph10 km/h from West | Partly Cloudy | Partly Cloudy |
| September 20 | 59°F15°C | 71°F22°C | 7 mph11 km/h from West | Mostly Clear | Partly Cloudy |
| September 21 | 59°F15°C | 70°F21°C | 8 mph12 km/h from West | Mostly Clear | Mostly Clear |
| September 22 | 59°F15°C | 78°F26°C | 5 mph8 km/h from West | Clear | Mostly Clear |
| September 23 | 61°F16°C | 73°F23°C | 5 mph8 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 24 | 60°F16°C | 72°F22°C | 7 mph11 km/h from West | Mostly Clear | Partly Cloudy |
No
Low of 59°F15°C, High of 72°F22°CWind: 6 mph10 km/h
Precipitation: None