Weather in Zagreb in August

A good month. August is a solid month to be in Zagreb. Highs average 29 °C, lows 16.8 °C, and rain falls on 10 days — nothing in the month is working against you.

August ranks 6 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, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 29 °C days and 16.8 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 13 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest August day reached 40.9 °C and the coldest night fell to 7.3 °C, and the wettest single day dropped 53 mm — roughly 64% of the month's rain in one day.

August is moderately variable: 17 mm in the driest year against 178 mm in the wettest, around an average of 83 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 5.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 62%.

How August sits in the year

Temperatures hold steady either side: 29 °C in July, 29 here, 22.9 in September. Nothing about the timing within the month matters much.

Daylight in August

14.2 hours of daylight, losing 1.4 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

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

August 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 — 2.3 °C cooler, 4 days more rain. Trieste is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: August works, with September the better month by 7 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Zagreb

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