Yes

you do need a jacket based on the weather in San Francisco (Parkside), California, United States 1 second ago

Why? Because there are strong winds blowing out there!
66°F19°C & Windy

Wind is 16 mph25 km/h from the West, gusting to 29 mph47 km/h
August 15
9pm65°F18°C16 mph25 km/h WestWindy
10pm64°F18°C16 mph25 km/h WestWindy
11pm62°F17°C16 mph26 km/h WestWindy
August 16
12am62°F16°C15 mph24 km/h WestWindy
1am61°F16°C14 mph23 km/h WestMostly Cloudy
2am61°F16°C14 mph22 km/h WestCloudy
3am61°F16°C13 mph21 km/h WestCloudy
4am60°F16°C13 mph21 km/h WestCloudy
5am60°F16°C13 mph20 km/h WestCloudy
6am60°F15°C12 mph20 km/h WestCloudy
7am60°F15°C12 mph19 km/h WestCloudy
8am60°F15°C12 mph19 km/h WestCloudy
DateLowHighWindDayNight
August 1556°F13°C67°F19°C8 mph14 km/h from WestMostly ClearMostly Cloudy
August 1659°F15°C68°F20°C12 mph19 km/h from WestMostly CloudyMostly Cloudy
August 1757°F14°C65°F18°C12 mph19 km/h from WestMostly CloudyMostly Cloudy
August 1857°F14°C65°F18°C11 mph17 km/h from WestPartly CloudyMostly Clear
August 1956°F13°C64°F18°C9 mph15 km/h from WestPartly CloudyPartly Cloudy
August 2055°F13°C67°F19°C6 mph10 km/h from WestMostly ClearPartly Cloudy
August 2155°F13°C67°F19°C7 mph11 km/h from WestMostly ClearMostly Clear

No

Low of 59°F15°C, High of 68°F20°C
Wind: 12 mph19 km/h
Precipitation: None

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