Yes

you do need a jacket based on the weather in San Francisco, CA 94123, USA 1 second ago

Why? Because sorry, it's too cool for just a hoodie!
56°F13°C & Partly Cloudy

Wind is 7 mph12 km/h from the Southwest, gusting to 16 mph25 km/h
June 1
6am56°F13°C8 mph12 km/h SouthwestPartly Cloudy
7am55°F13°C8 mph12 km/h SouthwestPartly Cloudy
8am55°F13°C8 mph13 km/h SouthwestPartly Cloudy
9am55°F13°C8 mph13 km/h SouthwestMostly Cloudy
10am56°F13°C9 mph14 km/h SouthwestPartly Cloudy
11am56°F14°C11 mph17 km/h SouthwestPartly Cloudy
12pm58°F14°C11 mph18 km/h SouthwestPartly Cloudy
1pm59°F15°C11 mph17 km/h SouthwestPartly Cloudy
2pm60°F16°C12 mph19 km/h SouthwestPartly Cloudy
3pm61°F16°C13 mph21 km/h SouthwestMostly Clear
4pm62°F17°C14 mph22 km/h SouthwestMostly Clear
5pm63°F17°C14 mph23 km/h SouthwestMostly Clear
DateLowHighWindDayNight
June 155°F13°C63°F17°C13 mph20 km/h from SouthwestMostly ClearPartly Cloudy
June 253°F12°C66°F19°C9 mph14 km/h from SouthwestMostly ClearPartly Cloudy
June 355°F13°C66°F19°C9 mph15 km/h from SouthwestMostly ClearPartly Cloudy
June 455°F13°C66°F19°C9 mph15 km/h from SouthwestMostly ClearPartly Cloudy
June 556°F13°C66°F19°C9 mph15 km/h from SouthwestMostly ClearPartly Cloudy
June 655°F13°C67°F19°C9 mph14 km/h from SouthwestMostly ClearPartly Cloudy
June 754°F12°C67°F20°C9 mph14 km/h from SouthwestMostly ClearPartly Cloudy

Yes

Low of 54°F12°C, High of 66°F19°C
Wind: 9 mph14 km/h
Precipitation: None

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