March in Zagreb averages a daily high of 13.1°C with nights around 4.5°C. Expect roughly 9 wet days totalling 50.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Zagreb is April–October.
Based on ZAGREB GRIC, HR (0.3km), 1995–2024. 28 years of March data.