If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Zenica: The hottest months are usually August and July, with an average temperature of 19°C, while the coldest months are January and February, with an average of 2°C. The snowiest months in Zenica are January, December, April and November, with each month seeing an average of 15 cm of snowfall.