Yes

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

Why? Because it's cool. Pleasantly cool, but cool.
53°F12°C & Cloudy

Wind is 4 mph6 km/h from the NE, gusting to 6 mph10 km/h
March 28
10am53°F12°C4 mph6 km/h NEMostly Cloudy
11am54°F12°C3 mph5 km/h NEMostly Cloudy
12pm57°F14°C3 mph5 km/h NMostly Cloudy
1pm60°F15°C5 mph8 km/h NWMostly Cloudy
2pm62°F17°C6 mph10 km/h NWMostly Cloudy
3pm64°F18°C8 mph13 km/h WPartly Cloudy
4pm65°F19°C9 mph15 km/h WPartly Cloudy
5pm66°F19°C11 mph17 km/h WMostly Clear
6pm66°F19°C12 mph19 km/h WMostly Clear
7pm65°F18°C12 mph19 km/h NWMostly Clear
8pm64°F18°C11 mph17 km/h NWMostly Clear
9pm62°F17°C10 mph16 km/h NWMostly Clear
DateLowHighWindDayNight
March 2853°F12°C66°F19°C8 mph13 km/h from NWPartly CloudyPartly Cloudy
March 2952°F11°C63°F17°C7 mph11 km/h from SWMostly ClearRain
March 3052°F11°C58°F14°C10 mph16 km/h from SRainDrizzle
March 3152°F11°C59°F15°C12 mph20 km/h from SDrizzleMostly Cloudy
April 150°F10°C63°F17°C5 mph9 km/h from WPartly CloudyClear
April 250°F10°C69°F20°C5 mph9 km/h from NWClearClear
April 354°F12°C74°F23°C5 mph8 km/h from NWClearClear

Yes

Low of 52°F11°C, High of 64°F18°C
Wind: 7 mph11 km/h
Precipitation: None

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