Yes

you do need a jacket based on the weather in San Francisco, CA, USA 1 second ago

Why? Because it's so gusty, you’re basically doing accidental parkour!
60°F16°C & Mostly Cloudy

Wind is 11 mph18 km/h from the West, gusting to 19 mph31 km/h
October 31
1am60°F16°C11 mph18 km/h WestCloudy
2am58°F15°C10 mph15 km/h WestCloudy
3am57°F14°C8 mph14 km/h WestCloudy
4am56°F14°C7 mph11 km/h WestCloudy
5am56°F13°C7 mph11 km/h WestCloudy
6am56°F13°C6 mph10 km/h WestPartly Cloudy
7am55°F13°C4 mph6 km/h WestPartly Cloudy
8am55°F13°C3 mph5 km/h SouthwestPartly Cloudy
9am55°F13°C3 mph5 km/h SouthwestPartly Cloudy
10am54°F12°C3 mph5 km/h SouthwestPartly Cloudy
11am54°F12°C2 mph4 km/h SouthwestPartly Cloudy
12pm54°F12°C2 mph3 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
October 3055°F13°C63°F17°C6 mph9 km/h from WestMostly CloudyPartly Cloudy
October 3153°F12°C66°F19°C4 mph7 km/h from WestPartly CloudyMostly Clear
November 154°F12°C69°F20°C4 mph6 km/h from WestMostly ClearPartly Cloudy
November 256°F13°C69°F21°C4 mph7 km/h from WestPartly CloudyPartly Cloudy
November 354°F12°C63°F17°C6 mph10 km/h from SouthwestMostly CloudyMostly Cloudy
November 454°F12°C68°F20°C6 mph10 km/h from SouthMostly CloudyDrizzle
November 554°F12°C64°F18°C16 mph25 km/h from SouthRainDrizzle

Yes

Low of 53°F12°C, High of 66°F19°C
Wind: 4 mph7 km/h
Precipitation: None

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