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, Yes, you do need a jacket.

Why? Because it's quite chilly.

Based on the weather in Newcastle upon Tyne, UK as of May 27, 2020 4:19am local time.

Now

Mostly Cloudy
Temp: 47°F9°C
Wind: 5 MPH9 KPH
Precipitation: None

Today

Next 2 hours: Yes

Next 4 hours: Yes

Next 8 hours: Yes

Tomorrow

Yes

Mostly cloudy throughout the day.
Low of 47°F9°C, High of 72°F22°C
Wind: 6 MPH9 KPH
Precipitation: 9% rain