Yes

you do need a jacket based on the weather in Hampstead Heath, London, UK 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
46°F8°C & Mostly Cloudy

Wind is 4 mph7 km/h from the West, gusting to 11 mph18 km/h
April 21
10pm46°F8°C4 mph7 km/h WestMostly Cloudy
11pm45°F7°C4 mph6 km/h WestPartly Cloudy
April 22
12am44°F7°C4 mph6 km/h SouthwestPartly Cloudy
1am44°F6°C4 mph6 km/h SouthwestMostly Clear
2am45°F7°C4 mph6 km/h SouthwestPartly Cloudy
3am47°F8°C4 mph7 km/h SouthwestPartly Cloudy
4am50°F10°C5 mph8 km/h SouthwestMostly Cloudy
5am53°F12°C5 mph8 km/h SouthwestMostly Cloudy
6am56°F13°C6 mph10 km/h SouthwestMostly Cloudy
7am58°F15°C7 mph12 km/h SouthwestMostly Cloudy
8am60°F15°C8 mph13 km/h SouthwestMostly Cloudy
9am61°F16°C8 mph13 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
April 2144°F6°C62°F16°C7 mph12 km/h from SouthwestMostly CloudyRain
April 2248°F9°C57°F14°C9 mph15 km/h from EastRainPartly Cloudy
April 2345°F7°C62°F16°C6 mph9 km/h from NortheastMostly CloudyPartly Cloudy
April 2443°F6°C62°F16°C6 mph9 km/h from EastMostly CloudyDrizzle
April 2547°F9°C63°F17°C4 mph6 km/h from NorthwestMostly CloudyMostly Clear
April 2646°F8°C67°F20°C5 mph8 km/h from SouthwestMostly CloudyMostly Cloudy
April 2748°F9°C67°F20°C7 mph12 km/h from SouthMostly CloudyMostly Cloudy

Yes

Low of 48°F9°C, High of 57°F14°C
Wind: 9 mph15 km/h
Precipitation: 64% rain

Support This Page