Yes

you do need a jacket based on the weather in Uddevalla, Sweden 1 second ago

Why? Because it's pretty chilly.
57°F14°C & Partly Cloudy

Wind is 9 mph15 km/h from the SW, gusting to 22 mph35 km/h
May 8
6am58°F14°C10 mph16 km/h SWPartly Cloudy
7am59°F15°C10 mph16 km/h SWPartly Cloudy
8am59°F15°C10 mph16 km/h SWPartly Cloudy
9am60°F15°C10 mph16 km/h SWPartly Cloudy
10am59°F15°C10 mph16 km/h SWPartly Cloudy
11am58°F15°C9 mph15 km/h SWPartly Cloudy
12pm56°F14°C8 mph13 km/h SWPartly Cloudy
1pm54°F12°C7 mph12 km/h SWMostly Cloudy
2pm52°F11°C6 mph10 km/h SWMostly Cloudy
3pm50°F10°C5 mph9 km/h SWMostly Cloudy
4pm48°F9°C5 mph8 km/h SWMostly Cloudy
5pm47°F8°C5 mph7 km/h SWMostly Cloudy
DateLowHighWindDayNight
May 743°F6°C60°F15°C9 mph14 km/h from SWPartly CloudyCloudy
May 845°F7°C56°F13°C12 mph19 km/h from SWDrizzleMostly Cloudy
May 945°F7°C61°F16°C7 mph11 km/h from NEMostly CloudyCloudy
May 1045°F7°C65°F18°C3 mph5 km/h from EPartly CloudyPartly Cloudy
May 1144°F7°C67°F19°C4 mph6 km/h from SWPartly CloudyMostly Clear
May 1245°F7°C69°F20°C5 mph8 km/h from SMostly ClearMostly Clear
May 1346°F8°C72°F22°C5 mph8 km/h from EMostly ClearClear

Yes

Low of 45°F7°C, High of 55°F13°C
Wind: 12 mph19 km/h
Precipitation: 46% rain

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