No
you don't need a jacket based on the weather in San Francisco, CA, USA 1 second ago
66°F19°C & Partly Cloudy
Wind is 9 mph15 km/h from the SW, gusting to 16 mph25 km/h
| September 20 | ||||
| 5pm | 66°F19°C | 10 mph17 km/h SW | Mostly Clear | |
| 6pm | 65°F19°C | 11 mph18 km/h SW | Mostly Clear | |
| 7pm | 65°F18°C | 12 mph19 km/h W | Mostly Clear | |
| 8pm | 63°F17°C | 12 mph19 km/h W | Mostly Clear | |
| 9pm | 61°F16°C | 11 mph17 km/h SW | Partly Cloudy | |
| 10pm | 59°F15°C | 9 mph15 km/h SW | Mostly Cloudy | |
| 11pm | 58°F14°C | 8 mph13 km/h SW | Mostly Cloudy | |
| September 21 | ||||
| 12am | 57°F14°C | 8 mph12 km/h SW | Mostly Cloudy | |
| 1am | 57°F14°C | 8 mph12 km/h SW | Partly Cloudy | |
| 2am | 56°F14°C | 7 mph12 km/h SW | Mostly Cloudy | |
| 3am | 56°F13°C | 7 mph12 km/h SW | Partly Cloudy | |
| 4am | 55°F13°C | 7 mph11 km/h SW | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 20 | 55°F13°C | 66°F19°C | 7 mph12 km/h from SW | Partly Cloudy | Partly Cloudy |
| September 21 | 54°F12°C | 70°F21°C | 7 mph11 km/h from SW | Mostly Clear | Partly Cloudy |
| September 22 | 54°F12°C | 70°F21°C | 6 mph9 km/h from W | Mostly Clear | Mostly Clear |
| September 23 | 53°F12°C | 77°F25°C | 4 mph7 km/h from W | Mostly Clear | Clear |
| September 24 | 54°F12°C | 73°F23°C | 5 mph9 km/h from W | Mostly Clear | Partly Cloudy |
| September 25 | 53°F11°C | 65°F18°C | 9 mph14 km/h from W | Mostly Cloudy | Partly Cloudy |
| September 26 | 55°F13°C | 67°F19°C | 7 mph11 km/h from W | Partly Cloudy | Partly Cloudy |
Yes
Low of 54°F12°C, High of 70°F21°CWind: 7 mph11 km/h
Precipitation: None