Yes

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

Why? Because it's bitterly cold.
48°F9°C & Mostly Cloudy

Wind is 4 mph7 km/h from the E, gusting to 10 mph16 km/h
May 3
5pm47°F8°C4 mph7 km/h EMostly Cloudy
6pm45°F7°C4 mph6 km/h EPartly Cloudy
7pm43°F6°C4 mph6 km/h EMostly Clear
8pm42°F5°C3 mph5 km/h EMostly Clear
9pm41°F5°C3 mph5 km/h EPartly Cloudy
10pm40°F4°C3 mph5 km/h EPartly Cloudy
11pm39°F4°C3 mph4 km/h EPartly Cloudy
May 4
12am40°F5°C2 mph4 km/h EPartly Cloudy
1am43°F6°C2 mph3 km/h EMostly Clear
2am48°F9°C2 mph3 km/h EMostly Clear
3am53°F12°C3 mph4 km/h EMostly Clear
4am58°F14°C3 mph5 km/h EMostly Clear
DateLowHighWindDayNight
May 241°F5°C65°F18°C10 mph16 km/h from EMostly CloudyPartly Cloudy
May 339°F4°C71°F22°C4 mph6 km/h from SEPartly CloudyRain
May 445°F7°C61°F16°C6 mph9 km/h from NEMostly CloudyDrizzle
May 542°F5°C56°F13°C10 mph16 km/h from EDrizzlePartly Cloudy
May 639°F4°C57°F14°C4 mph6 km/h from NMostly ClearPartly Cloudy
May 738°F3°C57°F14°C6 mph10 km/h from SEMostly CloudyMostly Cloudy
May 842°F5°C61°F16°C6 mph10 km/h from SWMostly CloudyCloudy

Yes

Low of 39°F4°C, High of 72°F22°C
Wind: 4 mph6 km/h
Precipitation: 4% rain

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