Yes

Based on the weather in London, UK as of April 4, 2020 3:43am local time

Why? Because it's pretty chilly.

Now

Clear
Temp: 41°F5°C
Wind: 3 MPH4 KPH
Precipitation: None

Today

Next 2 hours: Yes

Next 4 hours: Yes

Next 8 hours: Yes

Tomorrow

Yes

Clear throughout the day.
Low of 45°F7°C, High of 69°F21°C
Wind: 10 MPH16 KPH
Precipitation: 1% rain