Yes

you do need a jacket based on the weather in Southend-on-Sea, UK 1 second ago

Why? Because it's fairly windy outside!
64°F18°C & Cloudy

Wind is 12 mph20 km/h from the West, gusting to 22 mph36 km/h
September 16
1pm64°F18°C12 mph20 km/h WestCloudy
2pm62°F17°C10 mph17 km/h WestMostly Cloudy
3pm60°F16°C10 mph16 km/h WestMostly Cloudy
4pm59°F15°C10 mph16 km/h WestMostly Cloudy
5pm57°F14°C10 mph15 km/h WestMostly Cloudy
6pm56°F13°C9 mph15 km/h SouthwestMostly Cloudy
7pm55°F13°C9 mph15 km/h SouthwestMostly Cloudy
8pm55°F13°C9 mph14 km/h SouthwestCloudy
9pm54°F12°C8 mph14 km/h SouthwestCloudy
10pm54°F12°C8 mph13 km/h SouthwestCloudy
11pm54°F12°C8 mph13 km/h SouthwestCloudy
September 17
12am55°F13°C8 mph13 km/h SouthwestDrizzle
DateLowHighWindDayNight
September 1554°F12°C66°F19°C17 mph27 km/h from WestWindyDrizzle
September 1654°F12°C67°F20°C16 mph26 km/h from SouthwestRainMostly Cloudy
September 1762°F17°C73°F23°C16 mph26 km/h from SouthwestWindyMostly Cloudy
September 1859°F15°C76°F25°C8 mph13 km/h from SouthPartly CloudyPartly Cloudy
September 1958°F15°C71°F22°C7 mph11 km/h from SouthwestDrizzleRain
September 2054°F12°C62°F17°C16 mph25 km/h from NorthRainRain
September 2152°F11°C63°F17°C19 mph31 km/h from NortheastDrizzleWindy

Yes

Low of 55°F13°C, High of 67°F20°C
Wind: 16 mph26 km/h
Precipitation: 82% rain

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