Yes

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

Why? Because sorry, it's too cool for just a hoodie!
51°F11°C & Mostly Cloudy

Wind is 6 mph10 km/h from the Southwest, gusting to 10 mph16 km/h
April 19
8am51°F11°C6 mph10 km/h SouthwestMostly Cloudy
9am51°F11°C6 mph10 km/h SouthwestMostly Cloudy
10am51°F11°C6 mph10 km/h SouthwestMostly Cloudy
11am52°F11°C6 mph10 km/h SouthwestMostly Cloudy
12pm53°F12°C6 mph10 km/h SouthwestMostly Cloudy
1pm55°F13°C6 mph10 km/h SouthwestMostly Cloudy
2pm57°F14°C7 mph12 km/h SouthwestMostly Cloudy
3pm60°F15°C8 mph13 km/h SouthwestPartly Cloudy
4pm61°F16°C10 mph16 km/h SouthwestPartly Cloudy
5pm61°F16°C10 mph17 km/h SouthwestMostly Clear
6pm61°F16°C11 mph17 km/h SouthwestMostly Clear
7pm60°F16°C11 mph17 km/h SouthwestMostly Clear
DateLowHighWindDayNight
April 1951°F11°C61°F16°C9 mph14 km/h from SouthwestPartly CloudyMostly Cloudy
April 2051°F11°C63°F17°C6 mph10 km/h from SouthwestMostly ClearMostly Clear
April 2151°F10°C72°F22°C5 mph8 km/h from WestClearMostly Clear
April 2253°F12°C68°F20°C6 mph10 km/h from SouthwestMostly ClearMostly Clear
April 2351°F11°C60°F15°C11 mph17 km/h from SouthwestPartly CloudyMostly Cloudy
April 2450°F10°C58°F14°C11 mph18 km/h from WestCloudyCloudy
April 2550°F10°C59°F15°C11 mph18 km/h from SouthwestPartly CloudyDrizzle

Yes

Low of 51°F11°C, High of 63°F17°C
Wind: 6 mph10 km/h
Precipitation: None

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