Narvik city has an average yearly temperature of around 2.6 degrees Celsius, and there is small variation in max/min temperature throughout the year.

Average temperatures in Europe
European citiesAverage degrees CAverage degrees F
Narvik2.636.7
Reykjavik4.740.5
Helsinki5.141.2
Oslo6.343.3
Stockholm7.044.6
Copenhagen8.447.1
Frankfurt am Main10.050.0
London11.152.0

Source: climate-data.org