Weather in Zagreb in April

A good month. April is a solid month to be in Zagreb. Highs average 17 °C, lows 6 °C, and rain falls on 10 days — nothing in the month is working against you.

April ranks 4 of 12 in Zagreb: past the worst of the year but short of September, which is the month to book if the dates are open.

Rain on 10 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 17 °C days and 6 °C nights; the spread matters more here than any single number.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest April day reached 28.8 °C and the coldest night fell to -3.7 °C, and the wettest single day dropped 30 mm — roughly 48% of the month's rain in one day.

April is moderately variable: 9 mm in the driest year against 132 mm in the wettest, around an average of 62 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 7.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, high enough to notice on the warm days without dominating them.

How April sits in the year

The month is on the way up: 5.7 °C warmer than March, and May adds another 4.4 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in April

13.5 hours of daylight, gaining 1.5 hours across the month. That is between Zagreb's extremes of 15.7 and 8.7 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 32.2 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

April in Zagreb versus nearby

If Zagreb is one option among several, the nearby comparison is worth making. Graz is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Trieste is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: April is effectively as good as it gets here — 6 points behind September, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Zagreb

See all twelve months in Zagreb, or where else to go in April.