Yes

you do need a jacket based on the weather in Banja Luka 78000, Bosnia and Herzegovina 1 second ago

Why? Because it's bitterly cold.
41°F5°C & Mostly Cloudy

Wind is 1 mph2 km/h from the SE, gusting to 2 mph4 km/h
April 24
7pm41°F5°C2 mph3 km/h SEMostly Cloudy
8pm40°F4°C2 mph3 km/h SEMostly Cloudy
9pm39°F4°C2 mph2 km/h SEMostly Cloudy
10pm38°F3°C1 mph2 km/h SMostly Cloudy
11pm37°F3°C1 mph2 km/h SMostly Cloudy
April 25
12am37°F3°C2 mph3 km/h SMostly Cloudy
1am39°F4°C1 mph2 km/h SEMostly Cloudy
2am42°F6°C1 mph2 km/h EMostly Cloudy
3am45°F7°C3 mph5 km/h EMostly Cloudy
4am48°F9°C5 mph8 km/h EPartly Cloudy
5am51°F11°C5 mph9 km/h EMostly Cloudy
6am54°F12°C5 mph8 km/h NEMostly Cloudy
DateLowHighWindDayNight
April 2437°F3°C58°F14°C4 mph6 km/h from ERainMostly Clear
April 2536°F2°C64°F18°C2 mph4 km/h from NEPartly CloudyPartly Cloudy
April 2641°F5°C68°F20°C2 mph3 km/h from SWMostly ClearMostly Clear
April 2745°F7°C75°F24°C3 mph5 km/h from EMostly ClearMostly Clear
April 2850°F10°C78°F25°C5 mph8 km/h from NEMostly ClearClear
April 2952°F11°C77°F25°C5 mph9 km/h from NEMostly ClearPartly Cloudy
April 3054°F12°C75°F24°C5 mph8 km/h from EMostly CloudyMostly Cloudy

Yes

Low of 37°F3°C, High of 64°F18°C
Wind: 2 mph4 km/h
Precipitation: 13% rain

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