Yes

you do need a jacket based on the weather in Maldon CM9 6NA, UK 1 second ago

Why? Because it's so windy, your hat is now someone else's problem, two cities away!
65°F18°C & Mostly Cloudy

Wind is 13 mph21 km/h from the West, gusting to 27 mph43 km/h
June 6
11am64°F18°C13 mph20 km/h WestMostly Cloudy
12pm64°F18°C11 mph18 km/h WestCloudy
1pm64°F18°C12 mph19 km/h WestMostly Cloudy
2pm63°F17°C10 mph16 km/h WestCloudy
3pm61°F16°C8 mph13 km/h SouthwestCloudy
4pm58°F15°C7 mph12 km/h SouthwestCloudy
5pm56°F14°C7 mph11 km/h SouthwestCloudy
6pm55°F13°C6 mph10 km/h SouthwestCloudy
7pm54°F12°C6 mph10 km/h SouthwestCloudy
8pm53°F12°C7 mph12 km/h SouthwestCloudy
9pm53°F12°C8 mph12 km/h SouthwestCloudy
10pm52°F11°C7 mph12 km/h SouthwestDrizzle
DateLowHighWindDayNight
June 551°F11°C65°F18°C13 mph21 km/h from SouthwestDrizzleDrizzle
June 650°F10°C62°F17°C12 mph19 km/h from WestRainDrizzle
June 746°F8°C64°F18°C14 mph23 km/h from WestPartly CloudyMostly Clear
June 849°F9°C69°F20°C9 mph14 km/h from WestPartly CloudyMostly Cloudy
June 952°F11°C73°F23°C8 mph13 km/h from WestPartly CloudyMostly Clear
June 1055°F13°C72°F22°C9 mph15 km/h from EastMostly ClearPartly Cloudy
June 1159°F15°C76°F24°C10 mph17 km/h from EastMostly CloudyPartly Cloudy

Yes

Low of 50°F10°C, High of 63°F17°C
Wind: 12 mph19 km/h
Precipitation: 76% rain

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