Yes

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

Why? Because it's so windy, your hat will probably launch into orbit!
67°F20°C & Cloudy

Wind is 14 mph22 km/h from the Southwest, gusting to 28 mph45 km/h
September 17
1pm67°F19°C14 mph23 km/h SouthwestCloudy
2pm66°F19°C13 mph22 km/h SouthwestCloudy
3pm65°F18°C13 mph21 km/h SouthwestCloudy
4pm65°F18°C13 mph21 km/h SouthwestCloudy
5pm65°F18°C12 mph19 km/h SouthwestCloudy
6pm65°F18°C12 mph19 km/h SouthwestCloudy
7pm65°F18°C12 mph19 km/h SouthwestCloudy
8pm64°F18°C11 mph18 km/h SouthwestCloudy
9pm64°F18°C11 mph18 km/h SouthwestCloudy
10pm64°F18°C11 mph17 km/h SouthwestCloudy
11pm64°F18°C11 mph18 km/h SouthwestCloudy
September 18
12am64°F18°C11 mph17 km/h SouthwestCloudy
DateLowHighWindDayNight
September 1656°F13°C68°F20°C10 mph17 km/h from SouthwestDrizzleCloudy
September 1763°F17°C73°F23°C13 mph21 km/h from SouthwestMostly CloudyMostly Cloudy
September 1859°F15°C78°F25°C8 mph13 km/h from SouthPartly CloudyPartly Cloudy
September 1957°F14°C75°F24°C10 mph16 km/h from SouthwestDrizzlePartly Cloudy
September 2050°F10°C60°F16°C12 mph19 km/h from WestDrizzleDrizzle
September 2146°F8°C61°F16°C12 mph19 km/h from NortheastDrizzlePartly Cloudy
September 2247°F8°C60°F16°C13 mph22 km/h from NortheastDrizzleRain

No

Low of 64°F18°C, High of 73°F23°C
Wind: 13 mph21 km/h
Precipitation: None

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