Yes
you do need a jacket based on the weather in San Francisco (Parkmerced), California, United States 1 second ago
Why? Because it's cool. Pleasantly cool, but cool!
56°F14°C & Mostly Cloudy
Wind is 5 mph8 km/h from the West, gusting to 8 mph13 km/h
| October 19 | ||||
| 5pm | 58°F14°C | 5 mph8 km/h West | Mostly Cloudy | |
| 6pm | 60°F15°C | 6 mph10 km/h West | Mostly Cloudy | |
| 7pm | 61°F16°C | 6 mph10 km/h West | Mostly Cloudy | |
| 8pm | 63°F17°C | 5 mph8 km/h Southwest | Partly Cloudy | |
| 9pm | 65°F19°C | 5 mph9 km/h Southwest | Mostly Clear | |
| 10pm | 66°F19°C | 7 mph11 km/h West | Partly Cloudy | |
| 11pm | 65°F18°C | 8 mph14 km/h West | Mostly Clear | |
| October 20 | ||||
| 12am | 64°F18°C | 8 mph13 km/h West | Mostly Clear | |
| 1am | 63°F17°C | 7 mph12 km/h West | Mostly Clear | |
| 2am | 62°F17°C | 6 mph10 km/h West | Clear | |
| 3am | 61°F16°C | 6 mph10 km/h West | Mostly Clear | |
| 4am | 60°F15°C | 5 mph8 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| October 19 | 55°F13°C | 66°F19°C | 6 mph10 km/h from West | Partly Cloudy | Clear |
| October 20 | 54°F12°C | 73°F23°C | 5 mph8 km/h from Northeast | Clear | Clear |
| October 21 | 56°F13°C | 71°F22°C | 5 mph8 km/h from Southwest | Mostly Clear | Partly Cloudy |
| October 22 | 58°F14°C | 65°F18°C | 9 mph14 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| October 23 | 56°F13°C | 64°F18°C | 6 mph9 km/h from West | Partly Cloudy | Mostly Cloudy |
| October 24 | 55°F13°C | 65°F19°C | 6 mph10 km/h from Southwest | Mostly Cloudy | Cloudy |
| October 25 | 56°F13°C | 63°F17°C | 8 mph14 km/h from West | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 73°F23°CWind: 5 mph8 km/h
Precipitation: None