Yes

you do need a jacket based on the weather in Weymouth DT4 8EL, UK 1 second ago

Why? Because it's pretty chilly!
54°F12°C & Clear

Wind is 5 mph8 km/h from the West, gusting to 9 mph14 km/h
May 17
4pm54°F12°C5 mph9 km/h WestClear
5pm53°F12°C5 mph8 km/h WestClear
6pm52°F11°C5 mph8 km/h NorthwestClear
7pm51°F10°C4 mph7 km/h NorthwestClear
8pm50°F10°C4 mph6 km/h NorthwestClear
9pm50°F10°C4 mph6 km/h NorthClear
10pm49°F10°C4 mph6 km/h NorthClear
11pm50°F10°C5 mph9 km/h NorthClear
May 18
12am49°F10°C7 mph11 km/h NorthClear
1am50°F10°C7 mph11 km/h NortheastClear
2am52°F11°C7 mph11 km/h NortheastClear
3am55°F13°C7 mph11 km/h NortheastClear
DateLowHighWindDayNight
May 1647°F8°C59°F15°C7 mph12 km/h from SoutheastMostly ClearClear
May 1749°F10°C62°F17°C7 mph11 km/h from SoutheastClearMostly Clear
May 1849°F9°C66°F19°C11 mph17 km/h from EastMostly ClearClear
May 1951°F10°C66°F19°C7 mph11 km/h from NorthPartly CloudyPartly Cloudy
May 2053°F12°C69°F21°C9 mph14 km/h from NorthMostly ClearMostly Clear
May 2152°F11°C65°F19°C8 mph12 km/h from SouthwestPartly CloudyPartly Cloudy
May 2255°F13°C63°F17°C10 mph16 km/h from SouthwestMostly CloudyCloudy

Yes

Low of 49°F10°C, High of 62°F17°C
Wind: 7 mph11 km/h
Precipitation: None

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