Climate Insights for Zagreb

The climate in Zagreb is temperate. The average annual temperature is 12°C and approximately 1015mm of precipitation falls per year. Zagreb receives a notable amount of rainfall throughout the year, including during its driest month. Zagreb is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, December, February, when temperatures can drop to -3°C. Snowfall occurs from January to December, with around 61cm accumulating over the season.

Temperatures in Zagreb vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 28°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -3°C and the daily average is 1°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 5°C shift in average temperatures.

Zagreb is a moderately rainy area, receiving approximately 1015mm of precipitation annually, which averages out to around 85mm per month. The wettest month is May, averaging 130mm of rainfall. June and September also tend to see above-average precipitation. The driest month is January, with just 51mm. That's 79mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 61cm accumulating over the season. February typically sees the most snow at around 23cm.

Zagreb is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Zagreb, which began on June 21, 2026. Zagreb is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 28°C, while the coldest stretch bottoms out in January near -3°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Zagreb is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 92mm per month. By contrast, January can be quite cold with temperatures dropping to -3°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Zagreb based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.