Yes

you do need a jacket based on the weather in (Canary Wharf), England, United Kingdom 1 second ago

Why? Because it's pretty chilly and the wind is offering free, unsolicited face massages!
56°F13°C & Cloudy

Wind is 10 mph16 km/h from the South, gusting to 22 mph35 km/h
October 31
8am56°F13°C10 mph16 km/h SouthCloudy
9am57°F14°C10 mph17 km/h SouthCloudy
10am59°F15°C11 mph18 km/h SouthCloudy
11am60°F15°C12 mph20 km/h SouthCloudy
12pm60°F16°C14 mph22 km/h SouthDrizzle
1pm60°F16°C14 mph23 km/h SouthCloudy
2pm61°F16°C14 mph22 km/h SouthDrizzle
3pm60°F16°C14 mph22 km/h SouthMostly Cloudy
4pm60°F16°C14 mph22 km/h SouthMostly Cloudy
5pm59°F15°C14 mph22 km/h SouthDrizzle
6pm59°F15°C14 mph22 km/h SouthDrizzle
7pm58°F15°C13 mph21 km/h SouthDrizzle
DateLowHighWindDayNight
October 3156°F13°C61°F16°C13 mph20 km/h from SouthDrizzleRain
November 148°F9°C59°F15°C11 mph18 km/h from SouthwestDrizzleRain
November 246°F8°C53°F12°C8 mph12 km/h from WestRainPartly Cloudy
November 346°F8°C60°F15°C13 mph21 km/h from SouthwestMostly CloudyCloudy
November 453°F12°C59°F15°C11 mph18 km/h from SouthDrizzleMostly Cloudy
November 553°F12°C59°F15°C9 mph15 km/h from SouthDrizzleDrizzle
November 651°F11°C58°F15°C7 mph11 km/h from SouthMostly CloudyPartly Cloudy

Yes

Low of 48°F9°C, High of 59°F15°C
Wind: 11 mph18 km/h
Precipitation: 61% rain

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