Yes

you do need a jacket based on the weather in London W10 5QE, UK 1 second ago

Why? Because it's so windy, you’re practically horizontal just trying to walk!
70°F21°C & Cloudy

Wind is 12 mph20 km/h from the Southwest, gusting to 28 mph45 km/h
July 5
12pm70°F21°C12 mph20 km/h SouthwestCloudy
1pm70°F21°C12 mph19 km/h SouthwestMostly Cloudy
2pm69°F21°C12 mph19 km/h SouthwestMostly Cloudy
3pm68°F20°C11 mph17 km/h SouthwestMostly Cloudy
4pm67°F20°C10 mph16 km/h SouthwestMostly Cloudy
5pm66°F19°C9 mph15 km/h WestCloudy
6pm65°F18°C9 mph14 km/h WestCloudy
7pm64°F18°C9 mph14 km/h WestMostly Cloudy
8pm62°F17°C8 mph14 km/h WestPartly Cloudy
9pm62°F16°C8 mph13 km/h WestMostly Cloudy
10pm61°F16°C7 mph11 km/h WestCloudy
11pm61°F16°C7 mph11 km/h SouthwestCloudy
DateLowHighWindDayNight
July 462°F17°C70°F21°C10 mph16 km/h from SouthwestDrizzleMostly Cloudy
July 560°F16°C71°F22°C9 mph15 km/h from WestDrizzleRain
July 656°F13°C69°F21°C10 mph16 km/h from NorthDrizzleMostly Clear
July 754°F12°C73°F23°C7 mph11 km/h from NorthwestMostly ClearMostly Clear
July 856°F13°C80°F26°C5 mph7 km/h from NorthwestMostly ClearClear
July 962°F17°C84°F29°C4 mph6 km/h from WestMostly ClearPartly Cloudy
July 1065°F18°C83°F28°C6 mph10 km/h from SouthPartly CloudyMostly Clear

No

Low of 60°F16°C, High of 71°F22°C
Wind: 9 mph15 km/h
Precipitation: 41% rain

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