Yes

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

Why? Because a little drizzle out and it's so windy, your hat is now someone else's problem, two cities away!
71°F21°C & Drizzle

Wind is 14 mph23 km/h from the Southwest, gusting to 30 mph49 km/h
August 4
7am71°F22°C15 mph25 km/h SouthwestWindy
8am72°F22°C16 mph26 km/h SouthwestWindy
9am73°F23°C17 mph27 km/h SouthwestWindy
10am73°F23°C16 mph26 km/h SouthwestWindy
11am72°F22°C14 mph23 km/h SouthwestCloudy
12pm71°F22°C14 mph23 km/h SouthwestCloudy
1pm71°F22°C13 mph20 km/h WestMostly Cloudy
2pm71°F22°C11 mph18 km/h WestMostly Clear
3pm70°F21°C9 mph15 km/h WestMostly Clear
4pm67°F20°C8 mph13 km/h WestClear
5pm65°F18°C7 mph12 km/h WestClear
6pm63°F17°C7 mph11 km/h WestClear
DateLowHighWindDayNight
August 360°F16°C73°F23°C13 mph21 km/h from SouthwestDrizzleMostly Clear
August 455°F13°C72°F22°C12 mph20 km/h from WestMostly ClearPartly Cloudy
August 552°F11°C74°F23°C5 mph9 km/h from SouthwestPartly CloudyMostly Cloudy
August 657°F14°C75°F24°C11 mph18 km/h from SouthwestMostly CloudyMostly Cloudy
August 758°F15°C75°F24°C7 mph11 km/h from WestMostly CloudyMostly Cloudy
August 859°F15°C78°F26°C5 mph7 km/h from WestPartly CloudyPartly Cloudy
August 962°F17°C80°F27°C10 mph16 km/h from SouthwestMostly ClearPartly Cloudy

Yes

Low of 55°F13°C, High of 72°F22°C
Wind: 12 mph20 km/h
Precipitation: None

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