Yes

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

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
56°F13°C & Mostly Cloudy

Wind is 6 mph9 km/h from the West, gusting to 17 mph28 km/h
June 7
3pm56°F13°C6 mph10 km/h WestDrizzle
4pm55°F13°C7 mph11 km/h WestDrizzle
5pm54°F12°C7 mph11 km/h WestPartly Cloudy
6pm53°F12°C9 mph14 km/h WestPartly Cloudy
7pm52°F11°C9 mph14 km/h WestMostly Clear
8pm51°F11°C9 mph15 km/h WestClear
9pm50°F10°C10 mph16 km/h WestClear
10pm49°F10°C11 mph17 km/h WestMostly Clear
11pm49°F9°C11 mph18 km/h WestMostly Clear
June 8
12am48°F9°C11 mph18 km/h WestClear
1am48°F9°C11 mph18 km/h WestClear
2am49°F10°C11 mph18 km/h WestClear
DateLowHighWindDayNight
June 652°F11°C64°F18°C8 mph12 km/h from SouthwestRainDrizzle
June 748°F9°C64°F18°C12 mph20 km/h from WestPartly CloudyMostly Clear
June 850°F10°C68°F20°C8 mph12 km/h from WestMostly CloudyMostly Cloudy
June 954°F12°C71°F22°C9 mph14 km/h from WestMostly CloudyPartly Cloudy
June 1054°F12°C77°F25°C6 mph10 km/h from SoutheastMostly ClearMostly Cloudy
June 1160°F16°C79°F26°C8 mph13 km/h from SoutheastMostly CloudyPartly Cloudy
June 1260°F16°C80°F27°C8 mph13 km/h from SouthPartly CloudyMostly Clear

Yes

Low of 48°F9°C, High of 64°F18°C
Wind: 12 mph20 km/h
Precipitation: 9% rain

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