No

you don't need a jacket based on the weather in San Francisco, CA 94117, USA 1 second ago

70°F21°C & Partly Cloudy

Wind is 11 mph18 km/h from the West, gusting to 17 mph27 km/h
September 16
7pm69°F21°C11 mph18 km/h WestMostly Clear
8pm69°F20°C10 mph17 km/h WestMostly Clear
9pm67°F19°C10 mph16 km/h WestMostly Clear
10pm64°F18°C9 mph15 km/h WestMostly Clear
11pm62°F17°C8 mph13 km/h WestMostly Clear
September 17
12am61°F16°C7 mph12 km/h WestMostly Clear
1am60°F16°C6 mph10 km/h WestMostly Clear
2am61°F16°C5 mph8 km/h SouthwestMostly Clear
3am60°F15°C5 mph8 km/h SouthwestPartly Cloudy
4am59°F15°C5 mph7 km/h SouthwestPartly Cloudy
5am59°F15°C4 mph7 km/h SouthwestPartly Cloudy
6am58°F14°C4 mph6 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
September 1660°F15°C72°F22°C6 mph10 km/h from WestMostly ClearPartly Cloudy
September 1757°F14°C72°F22°C6 mph9 km/h from WestPartly CloudyMostly Cloudy
September 1861°F16°C68°F20°C8 mph13 km/h from SouthwestCloudyCloudy
September 1960°F16°C71°F22°C6 mph9 km/h from SouthwestPartly CloudyMostly Cloudy
September 2059°F15°C70°F21°C6 mph10 km/h from WestMostly ClearPartly Cloudy
September 2159°F15°C71°F22°C5 mph9 km/h from WestMostly ClearMostly Clear
September 2258°F15°C69°F21°C5 mph8 km/h from SouthwestPartly CloudyMostly Cloudy

Yes

Low of 57°F14°C, High of 72°F22°C
Wind: 6 mph9 km/h
Precipitation: None

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