Yes

you do need a jacket based on the weather in London N21 3HE, UK 1 second ago

Why? Because it's not very warm out and it's so gusty, you’re basically doing accidental parkour!
58°F14°C & Cloudy

Wind is 11 mph17 km/h from the South, gusting to 23 mph37 km/h
November 5
8am58°F14°C10 mph17 km/h SouthDrizzle
9am59°F15°C11 mph17 km/h SouthMostly Cloudy
10am60°F16°C11 mph18 km/h SouthMostly Cloudy
11am62°F16°C12 mph19 km/h SouthMostly Cloudy
12pm63°F17°C11 mph18 km/h SouthMostly Cloudy
1pm63°F17°C11 mph17 km/h SouthMostly Cloudy
2pm63°F17°C10 mph16 km/h SouthMostly Cloudy
3pm63°F17°C9 mph14 km/h SouthCloudy
4pm62°F16°C8 mph13 km/h SouthMostly Cloudy
5pm61°F16°C8 mph13 km/h SoutheastMostly Cloudy
6pm60°F15°C8 mph13 km/h SoutheastCloudy
7pm60°F15°C8 mph13 km/h SoutheastCloudy
DateLowHighWindDayNight
November 557°F14°C63°F17°C10 mph16 km/h from SouthDrizzleCloudy
November 655°F13°C63°F17°C6 mph10 km/h from SouthDrizzleMostly Cloudy
November 753°F11°C60°F16°C8 mph13 km/h from SouthMostly CloudyMostly Cloudy
November 847°F9°C59°F15°C5 mph9 km/h from SouthwestPartly CloudyMostly Clear
November 944°F7°C57°F14°C6 mph10 km/h from SouthPartly CloudyMostly Cloudy
November 1048°F9°C55°F13°C8 mph12 km/h from SouthDrizzleMostly Cloudy
November 1147°F8°C55°F13°C7 mph12 km/h from SouthMostly CloudyCloudy

Yes

Low of 55°F13°C, High of 63°F17°C
Wind: 6 mph10 km/h
Precipitation: 35% rain

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