Yes

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

Why? Because it's pretty chilly.
52°F11°C & Cloudy

Wind is 4 mph7 km/h from the S, gusting to 6 mph10 km/h
April 20
10am53°F11°C4 mph7 km/h SMostly Cloudy
11am54°F12°C5 mph8 km/h SMostly Cloudy
12pm56°F14°C5 mph8 km/h SPartly Cloudy
1pm59°F15°C5 mph8 km/h SMostly Clear
2pm61°F16°C5 mph9 km/h SWClear
3pm64°F18°C6 mph10 km/h SWClear
4pm65°F19°C7 mph12 km/h SWClear
5pm67°F19°C7 mph12 km/h SWClear
6pm68°F20°C8 mph12 km/h WClear
7pm68°F20°C8 mph13 km/h WClear
8pm68°F20°C8 mph12 km/h WClear
9pm67°F19°C7 mph11 km/h WClear
DateLowHighWindDayNight
April 2051°F10°C68°F20°C6 mph10 km/h from SWMostly ClearMostly Clear
April 2153°F12°C71°F21°C5 mph8 km/h from SWClearMostly Clear
April 2254°F12°C68°F20°C8 mph13 km/h from SWMostly ClearPartly Cloudy
April 2353°F12°C64°F18°C10 mph16 km/h from SWPartly CloudyMostly Cloudy
April 2453°F12°C62°F17°C9 mph14 km/h from SWPartly CloudyPartly Cloudy
April 2552°F11°C62°F17°C11 mph17 km/h from WPartly CloudyMostly Cloudy
April 2652°F11°C62°F17°C12 mph19 km/h from WDrizzleMostly Clear

Yes

Low of 53°F12°C, High of 71°F22°C
Wind: 5 mph8 km/h
Precipitation: None

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