Yes

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

Why? Because it's pretty chilly and it's really really huffing out there!
58°F15°C & Mostly Cloudy

Wind is 14 mph22 km/h from the South, gusting to 32 mph52 km/h
October 31
10pm58°F14°C14 mph23 km/h SouthMostly Cloudy
11pm58°F14°C15 mph24 km/h SouthMostly Cloudy
November 1
12am58°F14°C16 mph25 km/h SouthDrizzle
1am57°F14°C16 mph25 km/h SouthDrizzle
2am57°F14°C16 mph26 km/h SouthRain
3am56°F13°C15 mph25 km/h SouthwestRain
4am55°F13°C13 mph21 km/h SouthwestRain
5am54°F12°C13 mph20 km/h SouthwestDrizzle
6am53°F12°C12 mph19 km/h SouthwestCloudy
7am53°F12°C10 mph17 km/h SouthwestCloudy
8am53°F12°C10 mph16 km/h SouthwestMostly Cloudy
9am54°F12°C11 mph18 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
October 3156°F13°C60°F16°C9 mph14 km/h from SouthDrizzleRain
November 147°F8°C58°F14°C11 mph18 km/h from SouthwestDrizzleRain
November 245°F7°C53°F12°C8 mph13 km/h from WestRainMostly Cloudy
November 347°F9°C60°F16°C14 mph22 km/h from SouthwestCloudyCloudy
November 455°F13°C58°F15°C12 mph19 km/h from SouthDrizzleDrizzle
November 555°F13°C60°F16°C11 mph17 km/h from SouthDrizzleDrizzle
November 651°F10°C58°F14°C10 mph16 km/h from SouthwestPartly CloudyPartly Cloudy

Yes

Low of 47°F9°C, High of 58°F15°C
Wind: 11 mph18 km/h
Precipitation: 32% rain

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