Yes

you do need a jacket based on the weather in London N3 2JF, UK 1 second ago

Why? Because it's cool. Pleasantly cool, but cool and the wind makes walking forward feel like moonwalking in reverse!
53°F12°C & Cloudy

Wind is 14 mph22 km/h from the Southwest, gusting to 29 mph47 km/h
October 28
4am53°F12°C14 mph23 km/h SouthwestCloudy
5am53°F12°C14 mph22 km/h SouthwestCloudy
6am53°F12°C14 mph22 km/h SouthwestCloudy
7am53°F11°C12 mph20 km/h WestMostly Cloudy
8am53°F12°C12 mph19 km/h WestPartly Cloudy
9am54°F12°C12 mph20 km/h WestPartly Cloudy
10am55°F13°C13 mph21 km/h WestPartly Cloudy
11am56°F13°C14 mph22 km/h WestPartly Cloudy
12pm57°F14°C14 mph23 km/h WestPartly Cloudy
1pm58°F14°C14 mph23 km/h WestMostly Cloudy
2pm58°F14°C13 mph21 km/h WestMostly Cloudy
3pm57°F14°C12 mph19 km/h WestCloudy
DateLowHighWindDayNight
October 2850°F10°C58°F14°C12 mph19 km/h from WestMostly CloudyCloudy
October 2945°F7°C55°F13°C6 mph10 km/h from WestDrizzleMostly Clear
October 3042°F5°C56°F13°C7 mph10 km/h from SouthMostly CloudyDrizzle
October 3155°F13°C61°F16°C12 mph19 km/h from SouthRainRain
November 146°F8°C56°F14°C14 mph23 km/h from SouthwestDrizzleDrizzle
November 242°F6°C52°F11°C7 mph11 km/h from SouthwestDrizzleDrizzle
November 343°F6°C56°F13°C11 mph18 km/h from SouthwestDrizzleCloudy

Yes

Low of 45°F7°C, High of 55°F13°C
Wind: 6 mph10 km/h
Precipitation: 74% rain

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