Grožnjan Weather & Climate: Best Time to Visit

Visitors to Grožnjan can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 9°C (48°F) in January.

Nighttime temperatures range from 21°C (70°F) in August to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Grožnjan is known for its substantial rainfall, with annual precipitation reaching 1231 mm (48 in). The seasons in Grožnjan bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 160 mm (6.3 in) of precipitation. This rainfall is distributed across 13 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 58 mm (2.3 in) over 11 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Grožnjan Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Grožnjan, summer days are longer and more sunny, with daily sunshine hours peaking at 10.6 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.2 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is moderate throughout the year in Grožnjan.

The city experiences its highest humidity in January, reaching 67%. In July, the humidity drops to its lowest level at 50%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year