Yes

you do need a jacket based on the weather in Union St, London SE1 1SZ, UK 1 second ago

Why? Because it's pretty chilly!
54°F12°C & Mostly Clear

Wind is 7 mph12 km/h from the West, gusting to 19 mph30 km/h
November 2
4pm53°F12°C7 mph12 km/h WestMostly Clear
5pm52°F11°C6 mph9 km/h SouthwestMostly Clear
6pm51°F11°C6 mph10 km/h SouthwestClear
7pm50°F10°C6 mph10 km/h SouthwestClear
8pm49°F9°C7 mph11 km/h SouthwestClear
9pm47°F8°C7 mph11 km/h SouthwestMostly Clear
10pm47°F8°C7 mph11 km/h SouthwestPartly Cloudy
11pm47°F8°C6 mph10 km/h SouthwestPartly Cloudy
November 3
12am47°F8°C7 mph11 km/h SouthwestPartly Cloudy
1am47°F9°C7 mph12 km/h SouthwestPartly Cloudy
2am48°F9°C8 mph13 km/h SouthwestCloudy
3am49°F10°C8 mph13 km/h SouthwestCloudy
DateLowHighWindDayNight
November 246°F8°C55°F13°C6 mph10 km/h from WestRainPartly Cloudy
November 347°F8°C60°F16°C13 mph21 km/h from SouthwestMostly CloudyCloudy
November 456°F13°C59°F15°C11 mph18 km/h from SouthDrizzleDrizzle
November 556°F13°C61°F16°C9 mph15 km/h from SouthCloudyDrizzle
November 650°F10°C59°F15°C10 mph16 km/h from SouthMostly CloudyPartly Cloudy
November 747°F8°C58°F14°C9 mph14 km/h from SouthDrizzleThunderstorms
November 847°F8°C58°F14°C6 mph10 km/h from SouthwestPartly CloudyMostly Clear

Yes

Low of 46°F8°C, High of 61°F16°C
Wind: 13 mph21 km/h
Precipitation: None

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