Yes

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

Why? Because it's not very warm out!
58°F14°C & Cloudy

Wind is 2 mph4 km/h from the Southeast, gusting to 4 mph7 km/h
May 7
4am58°F14°C3 mph5 km/h SouthPartly Cloudy
5am57°F14°C2 mph4 km/h SoutheastPartly Cloudy
6am57°F14°C2 mph3 km/h NorthwestPartly Cloudy
7am57°F14°C2 mph3 km/h NorthPartly Cloudy
8am57°F14°C3 mph4 km/h NorthPartly Cloudy
9am57°F14°C3 mph4 km/h NorthPartly Cloudy
10am58°F14°C3 mph5 km/h NorthPartly Cloudy
11am59°F15°C3 mph5 km/h NorthPartly Cloudy
12pm61°F16°C4 mph7 km/h NorthwestPartly Cloudy
1pm63°F17°C6 mph10 km/h NorthwestPartly Cloudy
2pm64°F18°C8 mph13 km/h NorthwestMostly Clear
3pm66°F19°C10 mph16 km/h NorthwestMostly Clear
DateLowHighWindDayNight
May 757°F14°C67°F20°C8 mph14 km/h from NorthwestMostly ClearMostly Clear
May 857°F14°C70°F21°C7 mph12 km/h from NorthwestMostly ClearMostly Clear
May 959°F15°C75°F24°C6 mph9 km/h from NorthwestMostly ClearClear
May 1062°F17°C77°F25°C5 mph8 km/h from WestMostly ClearMostly Cloudy
May 1161°F16°C72°F22°C6 mph10 km/h from SouthwestMostly CloudyPartly Cloudy
May 1258°F15°C64°F18°C9 mph14 km/h from WestMostly CloudyMostly Cloudy
May 1356°F13°C63°F17°C11 mph18 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 57°F14°C, High of 71°F22°C
Wind: 7 mph12 km/h
Precipitation: None

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