Yes

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

Why? Because it's windy enough to give you a brand new hairdo!
65°F18°C & Mostly Clear

Wind is 10 mph16 km/h from the West, gusting to 21 mph34 km/h
July 16
5am67°F19°C11 mph17 km/h WestPartly Cloudy
6am69°F21°C10 mph17 km/h NorthwestPartly Cloudy
7am71°F22°C10 mph16 km/h NorthwestMostly Cloudy
8am73°F23°C10 mph16 km/h NorthwestMostly Cloudy
9am75°F24°C10 mph15 km/h NorthwestMostly Cloudy
10am76°F24°C9 mph15 km/h NorthwestMostly Cloudy
11am77°F25°C9 mph14 km/h NorthwestMostly Cloudy
12pm77°F25°C8 mph13 km/h NorthwestMostly Cloudy
1pm77°F25°C8 mph12 km/h NorthwestMostly Cloudy
2pm75°F24°C7 mph11 km/h NorthwestCloudy
3pm74°F23°C6 mph9 km/h NorthMostly Cloudy
4pm72°F22°C4 mph6 km/h NorthMostly Cloudy
DateLowHighWindDayNight
July 1559°F15°C77°F25°C9 mph15 km/h from NorthwestPartly CloudyMostly Cloudy
July 1662°F17°C80°F27°C4 mph6 km/h from SouthwestMostly CloudyMostly Cloudy
July 1762°F17°C81°F27°C5 mph9 km/h from SouthPartly CloudyRain
July 1863°F17°C75°F24°C5 mph8 km/h from SouthRainRain
July 1959°F15°C70°F21°C9 mph14 km/h from SouthDrizzleDrizzle
July 2058°F14°C69°F20°C6 mph9 km/h from SouthwestDrizzleMostly Cloudy
July 2159°F15°C72°F22°C7 mph10 km/h from WestRainDrizzle

No

Low of 63°F17°C, High of 81°F27°C
Wind: 4 mph6 km/h
Precipitation: 8% rain

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