Yes

you do need a jacket based on the weather in Nitra, Slovakia 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!

36°F2°C & Partly Cloudy

Wind is 1 mph2 km/h from the East, gusting to 2 mph4 km/h

Date	Low	High	Wind	Day	Night
January 31	28°F-2°C	43°F6°C	3 mph5 km/h from North	Clear	Cloudy
February 1	31°F-0°C	42°F5°C	3 mph5 km/h from North	Mostly Cloudy	Partly Cloudy
February 2	28°F-2°C	41°F5°C	5 mph9 km/h from North	Mostly Clear	Clear
February 3	23°F-5°C	39°F4°C	2 mph3 km/h from Southwest	Clear	Mostly Clear
February 4	25°F-4°C	42°F5°C	4 mph7 km/h from Northwest	Clear	Mostly Clear
February 5	30°F-1°C	43°F6°C	5 mph8 km/h from North	Partly Cloudy	Mostly Cloudy
February 6	30°F-1°C	39°F4°C	11 mph18 km/h from Southeast	Mostly Cloudy	Mostly Cloudy

Low of 31°F-1°C, High of 42°F6°C
Wind: 3 mph5 km/h
Precipitation: None