Zagreb climate
Zagreb is warmest in July, with average highs of 27 °C, and coldest in January, when nights average -2.4 °C. September is the wettest month (96 mm) and January the driest (51 mm). Figures are 1991–2020 climate normals.
Across a full year Zagreb averages 882 mm of rain, 72 days above 25 °C and 79 days below freezing.
Croatia · population 663,592 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month July 27 °C
- Coldest month January -2.4 °C
- Driest month January 51 mm
- Wettest month September 96 mm
- Least cloud August 43 % cloud
- Hottest on record August 39 °C
- Coldest on record February -23 °C
What to expectZagreb through the year
Zagreb has a clear annual cycle: average daily highs run from 4.6 °C in January to 27 °C in July, a swing of 22 °C in mean temperature across the year.
Counted across a normal year, 72 days a year reach 25 °C, 21 of them reach 30 °C, 79 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.
Rain is spread fairly evenly through the year, from 51 mm in January to 96 mm in September. There is no dry season to aim for.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 4.6 °C | 51 mm | 69 % |
| February | 7.1 °C | 55 mm | 63 % |
| March | 12.0 °C | 59 mm | 61 % |
| April | 16.8 °C | 68 mm | 58 % |
| May | 21.1 °C | 87 mm | 57 % |
| June | 25.1 °C | 82 mm | 53 % |
| July | 27.5 °C | 76 mm | 45 % |
| August | 27.4 °C | 79 mm | 43 % |
| September | 21.7 °C | 96 mm | 55 % |
| October | 16.5 °C | 80 mm | 61 % |
| November | 10.4 °C | 81 mm | 72 % |
| December | 5.0 °C | 68 mm | 71 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 4.6 °C | -2.4 °C | 0.9 °C | 16.4 °C | -21.5 °C | 0 | 0 | 23 |
| February | 7.1 °C | -1.7 °C | 2.4 °C | 19.8 °C | -23.0 °C | 0 | 0 | 19 |
| March | 12.0 °C | 1.7 °C | 6.7 °C | 23.9 °C | -16.5 °C | 0 | 0 | 9 |
| April | 16.8 °C | 6.0 °C | 11.6 °C | 27.6 °C | -3.3 °C | 0 | 0 | 1 |
| May | 21.1 °C | 10.7 °C | 16.1 °C | 32.1 °C | 2.7 °C | 6 | 0 | 0 |
| June | 25.1 °C | 14.9 °C | 20.3 °C | 35.0 °C | 6.4 °C | 15 | 4 | 0 |
| July | 27.5 °C | 17.1 °C | 22.5 °C | 37.8 °C | 9.4 °C | 22 | 8 | 0 |
| August | 27.4 °C | 17.2 °C | 22.3 °C | 38.8 °C | 6.7 °C | 22 | 9 | 0 |
| September | 21.7 °C | 12.5 °C | 17.1 °C | 33.0 °C | 2.9 °C | 6 | 1 | 0 |
| October | 16.5 °C | 7.9 °C | 12.0 °C | 26.2 °C | -3.0 °C | 0 | 0 | 1 |
| November | 10.4 °C | 3.5 °C | 6.7 °C | 21.5 °C | -10.8 °C | 0 | 0 | 6 |
| December | 5.0 °C | -1.3 °C | 1.7 °C | 16.9 °C | -20.5 °C | 0 | 0 | 20 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 51 mm | 8 | 9.1 h/day | 69 % | 83 % | 11 km/h |
| February | 55 mm | 8 | 10 h/day | 63 % | 77 % | 13 km/h |
| March | 59 mm | 9 | 12 h/day | 61 % | 72 % | 14 km/h |
| April | 68 mm | 10 | 14 h/day | 58 % | 70 % | 14 km/h |
| May | 87 mm | 12 | 15 h/day | 57 % | 71 % | 13 km/h |
| June | 82 mm | 11 | 16 h/day | 53 % | 70 % | 12 km/h |
| July | 76 mm | 10 | 15 h/day | 45 % | 67 % | 12 km/h |
| August | 79 mm | 9 | 14 h/day | 43 % | 67 % | 11 km/h |
| September | 96 mm | 10 | 13 h/day | 55 % | 75 % | 12 km/h |
| October | 80 mm | 9 | 11 h/day | 61 % | 80 % | 12 km/h |
| November | 81 mm | 9 | 9.5 h/day | 72 % | 85 % | 11 km/h |
| December | 68 mm | 10 | 8.7 h/day | 71 % | 86 % | 11 km/h |
How Zagreb compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Zagreb | 27 °C | -2.4 °C | 882 mm | 72 |
| Ljubljana · Slovenia | 25 °C | -3.1 °C | 1,175 mm | 47 |
| Graz · Austria | 24 °C | -5.3 °C | 774 mm | 38 |
| Banja Luka · Bosnia and Herzegovina | 27 °C | -3.0 °C | 1,006 mm | 76 |
| Trieste · Italy | 28 °C | 1.2 °C | 1,489 mm | 72 |
Planning a trip? See the best time to visit Zagreb.
QuestionsCommon questions about Zagreb’s climate
When is the best time to visit Zagreb?
That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and January the driest. The month-by-month table above has the full picture.
How hot does Zagreb get?
In July, the warmest month, daily highs average 27 °C. About 21 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.
How cold does it get in winter?
Nights average -2.4 °C in January, the coldest month. A normal year has 79 nights below freezing.
Which month is wettest in Zagreb?
September, averaging 96 mm over 10 days with rain. The driest month is January with 51 mm. The year as a whole averages 882 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Zagreb rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- 45.814°, 15.978° (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.