No

you don't need a jacket based on the weather in London, UK 27 minutes ago

66°F19°C & Mostly Cloudy

Wind is 3 mph5 km/h from the East, gusting to 10 mph16 km/h
August 23
6am67°F20°C3 mph6 km/h EastMostly Cloudy
7am69°F21°C3 mph5 km/h EastCloudy
8am71°F22°C3 mph5 km/h EastMostly Cloudy
9am72°F22°C3 mph5 km/h EastMostly Cloudy
10am72°F22°C3 mph5 km/h EastMostly Cloudy
11am72°F22°C5 mph7 km/h EastCloudy
12pm71°F22°C5 mph8 km/h EastCloudy
1pm70°F21°C6 mph10 km/h EastCloudy
2pm69°F20°C6 mph10 km/h EastCloudy
3pm67°F20°C7 mph11 km/h SoutheastCloudy
4pm65°F19°C7 mph11 km/h SoutheastMostly Cloudy
5pm64°F18°C6 mph10 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
August 2259°F15°C72°F22°C4 mph6 km/h from EastMostly CloudyMostly Cloudy
August 2357°F14°C74°F24°C5 mph7 km/h from SouthMostly CloudyPartly Cloudy
August 2458°F14°C78°F25°C7 mph11 km/h from SouthClearPartly Cloudy
August 2562°F17°C75°F24°C8 mph13 km/h from SouthwestMostly CloudyPartly Cloudy
August 2658°F14°C71°F22°C10 mph16 km/h from SouthMostly CloudyDrizzle
August 2758°F15°C69°F20°C6 mph10 km/h from SouthwestDrizzleDrizzle
August 2856°F13°C66°F19°C5 mph8 km/h from SouthwestDrizzleMostly Clear

Yes

Low of 57°F14°C, High of 74°F24°C
Wind: 5 mph7 km/h
Precipitation: None

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