No

you don't need a jacket based on the weather in London, UK 2 minutes ago

60°F15°C & Partly Cloudy

Wind is 4 mph7 km/h from the South, gusting to 11 mph18 km/h
August 27
3am61°F16°C6 mph10 km/h SouthPartly Cloudy
4am63°F17°C9 mph14 km/h SouthMostly Cloudy
5am65°F19°C10 mph16 km/h SouthwestMostly Cloudy
6am67°F19°C12 mph19 km/h SouthMostly Cloudy
7am68°F20°C12 mph19 km/h SouthMostly Cloudy
8am69°F20°C13 mph20 km/h SouthMostly Cloudy
9am69°F21°C14 mph22 km/h SouthwestMostly Cloudy
10am69°F21°C14 mph22 km/h SouthwestRain
11am68°F20°C13 mph21 km/h SouthwestRain
12pm67°F20°C12 mph20 km/h SouthwestCloudy
1pm67°F19°C12 mph19 km/h SouthwestCloudy
2pm66°F19°C10 mph17 km/h SouthwestCloudy
DateLowHighWindDayNight
August 2659°F15°C69°F21°C11 mph18 km/h from SouthwestRainPartly Cloudy
August 2756°F13°C67°F20°C10 mph16 km/h from SouthwestDrizzleDrizzle
August 2857°F14°C68°F20°C6 mph10 km/h from WestRainPartly Cloudy
August 2956°F13°C68°F20°C11 mph18 km/h from SouthDrizzleDrizzle
August 3057°F14°C67°F19°C13 mph21 km/h from SouthwestPartly CloudyPartly Cloudy
August 3154°F12°C65°F18°C10 mph15 km/h from SouthwestDrizzleMostly Clear
September 154°F12°C66°F19°C8 mph13 km/h from SouthwestMostly CloudyMostly Cloudy

Yes

Low of 56°F14°C, High of 67°F20°C
Wind: 10 mph16 km/h
Precipitation: 38% rain

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