Gromnik Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Gromnik.
Climate overview of Gromnik
The climate in Gromnik, Croatia, is marked by large temperature swings across the seasons, ranging from 28°C (82°F) in August to 9°C (48°F) in January.
The city has a wet climate, receiving around 1685 mm (66 in) of rain/snowfall per year. Despite the high annual total, it has a distinct rainy season from September to November, with warm summers and cold winters. November is the wettest month. Sunshine peaks in July, when the city sees around 9.9 hours of sunshine per day.
Gromnik Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gromnik - and find the best time to visit.
Monthly Temperature in Gromnik
In Gromnik, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 28°C (82°F) in August to a chilly 9°C (48°F) in January.
Nighttime temperatures range from 20°C (68°F) in August to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Gromnik
Gromnik experiences significant rain/snowfall throughout the year, averaging 1685 mm (66 in) of precipitation annually. The seasons in Gromnik bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 229 mm (9 in) of precipitation. This rainfall is distributed across 14 rainy days.
In contrast, the driest month, July, experiences much less rainfall, totaling 78 mm (3.1 in) over 11 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Gromnik Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Gromnik
In Gromnik, summer days are longer and more sunny, with daily sunshine hours peaking at 9.9 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 3.3 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Gromnik by Month
The relative humidity is high throughout the year in Gromnik.
The city experiences its highest humidity in November, reaching 67%. In July, the humidity drops to its lowest level at 56%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Gromnik
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June and July
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: A distinct rainy season from September to November, with warm summers and cold winters
Frequently asked questions about the climate in Gromnik
What is the best time to visit Gromnik?
June and July typically offer the most optimal weather in Gromnik. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Gromnik has a distinct rainy season from September to November, with warm summers and cold winters.
What temperatures can I expect in Gromnik?
Daytime highs range from 9°C (48°F) in January to 28°C (82°F) in August. Nighttime lows range from 3°C (37°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Gromnik get?
Annual rainfall is around 1685 mm (66 in). November is the wettest month with 229 mm (9 in), while July is the driest with 78 mm (3.1 in).
How sunny is Gromnik?
Gromnik receives around 2,222 hours of sunshine per year. July is the sunniest month with 298 hours, while December is the cloudiest with just 100 hours. Overall, Gromnik enjoys abundant sunshine.
Gromnik 3-Day Forecast
Gromnik on the map
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