Yes

you do need a jacket based on the weather in Malm, Norway 1 second ago

Why? Because it's cold. simple as that.
41°F5°C & Cloudy

Wind is 3 mph5 km/h from the E, gusting to 5 mph8 km/h
April 26
3pm41°F5°C3 mph5 km/h NECloudy
4pm39°F4°C3 mph5 km/h NECloudy
5pm37°F3°C3 mph5 km/h NMostly Cloudy
6pm36°F2°C3 mph5 km/h NCloudy
7pm35°F1°C3 mph5 km/h NCloudy
8pm34°F1°C3 mph5 km/h NCloudy
9pm33°F1°C3 mph4 km/h NCloudy
10pm32°F0°C3 mph4 km/h NCloudy
11pm32°F0°C2 mph4 km/h NCloudy
April 27
12am33°F1°C2 mph4 km/h NCloudy
1am35°F2°C2 mph3 km/h NCloudy
2am37°F3°C1 mph2 km/h NMostly Cloudy
DateLowHighWindDayNight
April 2532°F0°C48°F9°C6 mph10 km/h from SEMostly ClearCloudy
April 2632°F0°C46°F8°C1 mph2 km/h from NECloudyMostly Cloudy
April 2733°F1°C53°F12°C7 mph11 km/h from SEMostly ClearMostly Cloudy
April 2841°F5°C53°F12°C12 mph19 km/h from SEDrizzleDrizzle
April 2939°F4°C54°F12°C4 mph6 km/h from SEPartly CloudyMostly Clear
April 3038°F3°C59°F15°C3 mph5 km/h from SEMostly ClearMostly Clear
May 139°F4°C58°F14°C3 mph5 km/h from NWMostly ClearMostly Clear

Yes

Low of 32°F0°C, High of 46°F8°C
Wind: 1 mph2 km/h
Precipitation: 13% rain

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