No

Why? Because you should be inside at home! #StayHome

But if you absolutely had to go out to get groceries, medication or other essential travel, No, you don't need a jacket.

Based on the weather in San Diego (Egger Highlands), California, United States as of June 1, 2020 1:19pm local time.

Now

Overcast
Temp: 73°F23°C
Wind: 10 MPH17 KPH
Precipitation: None

Today

Next 2 hours: No

Next 4 hours: No

Next 8 hours: No

Tomorrow

No

Mostly cloudy throughout the day.
Low of 59°F15°C, High of 73°F23°C
Wind: 7 MPH11 KPH
Precipitation: 2% rain