Postojna Weather & Climate: Best Time to Visit

In Postojna, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 26°C (79°F) in July to a chilly 5°C (41°F) in January.

Nighttime temperatures range from 15°C (59°F) in July to -2°C (28°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Postojna experiences significant rain/snowfall throughout the year, averaging 1651 mm (65 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, September, sees around 181 mm (7.1 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, January, still receives a respectable 89 mm (3.5 in) of snow/rainfall. For more details, please visit our Postojna Precipitation page.

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

The average number of days each month with precipitation

In Postojna, summer days are longer and more sunny, with daily sunshine hours peaking at 9.7 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.8 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

The relative humidity is high throughout the year in Postojna.

The city experiences its highest humidity in October, reaching 69%. In March, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year