Yes

you do need a jacket based on the weather in Central London, London SW1A 2DR, UK 2 minutes ago

Why? Because it's super windy outside!
75°F24°C & Cloudy

Wind is 12 mph20 km/h from the South, gusting to 29 mph47 km/h
September 7
12pm74°F23°C12 mph19 km/h SouthwestCloudy
1pm73°F23°C11 mph18 km/h SouthwestCloudy
2pm71°F22°C11 mph17 km/h SouthwestMostly Cloudy
3pm69°F21°C10 mph16 km/h SouthwestPartly Cloudy
4pm67°F20°C9 mph14 km/h SouthwestMostly Clear
5pm65°F18°C9 mph14 km/h SouthwestPartly Cloudy
6pm63°F17°C7 mph12 km/h SouthwestMostly Cloudy
7pm62°F17°C7 mph11 km/h SouthwestMostly Cloudy
8pm61°F16°C6 mph10 km/h SouthwestMostly Cloudy
9pm60°F16°C5 mph9 km/h SouthwestMostly Clear
10pm59°F15°C5 mph8 km/h SouthwestMostly Clear
11pm58°F15°C5 mph9 km/h SouthwestPartly Cloudy
DateLowHighWindDayNight
September 660°F16°C78°F25°C9 mph14 km/h from SouthMostly CloudyPartly Cloudy
September 757°F14°C70°F21°C7 mph12 km/h from SouthwestMostly ClearPartly Cloudy
September 851°F11°C69°F21°C5 mph8 km/h from SouthPartly CloudyPartly Cloudy
September 955°F13°C67°F20°C10 mph16 km/h from SouthMostly CloudyRain
September 1053°F12°C64°F18°C11 mph18 km/h from SouthwestDrizzleMostly Clear
September 1150°F10°C64°F18°C10 mph17 km/h from SouthwestDrizzlePartly Cloudy
September 1250°F10°C63°F17°C10 mph16 km/h from SouthwestDrizzleRain

Yes

Low of 57°F14°C, High of 70°F21°C
Wind: 7 mph12 km/h
Precipitation: None

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