Yes

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

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

Wind is 3 mph5 km/h from the S, gusting to 6 mph10 km/h
March 29
12pm55°F13°C4 mph7 km/h SWPartly Cloudy
1pm58°F14°C5 mph9 km/h SWPartly Cloudy
2pm59°F15°C6 mph10 km/h SWMostly Clear
3pm61°F16°C7 mph12 km/h SWMostly Clear
4pm61°F16°C8 mph13 km/h SWMostly Clear
5pm62°F17°C9 mph15 km/h SWMostly Clear
6pm61°F16°C10 mph15 km/h SWMostly Clear
7pm61°F16°C9 mph15 km/h SWMostly Clear
8pm60°F16°C9 mph14 km/h SWMostly Clear
9pm59°F15°C8 mph13 km/h SWMostly Clear
10pm58°F14°C8 mph12 km/h SWMostly Clear
11pm57°F14°C7 mph11 km/h SMostly Clear
DateLowHighWindDayNight
March 2949°F10°C62°F17°C7 mph12 km/h from SWMostly ClearRain
March 3052°F11°C57°F14°C9 mph15 km/h from SRainRain
March 3151°F11°C60°F16°C11 mph18 km/h from SRainDrizzle
April 150°F10°C63°F17°C6 mph10 km/h from WMostly ClearClear
April 248°F9°C67°F19°C6 mph9 km/h from WClearClear
April 350°F10°C70°F21°C5 mph9 km/h from WClearPartly Cloudy
April 452°F11°C62°F17°C8 mph13 km/h from SWPartly CloudyMostly Cloudy

Yes

Low of 53°F12°C, High of 57°F14°C
Wind: 9 mph15 km/h
Precipitation: 90% rain

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