Climate Insights for Posušje

The climate in Posušje is temperate. The average annual temperature is 12°C and approximately 1826mm of precipitation falls per year. Posušje receives a notable amount of rainfall throughout the year, including during its driest month. Posušje 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, February, December, when temperatures can drop to -2°C. Snowfall occurs from January to December, with around 79cm accumulating over the season.

Temperatures in Posušje 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 29°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 5°C shift in average temperatures.

Posušje is a fairly wet location, receiving approximately 1826mm of precipitation annually, which averages out to around 152mm per month. The wettest month is November, averaging 287mm of rainfall. December and January also tend to see above-average precipitation. The driest month is July, with just 51mm. That's 236mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 79cm accumulating over the season. January typically sees the most snow at around 26cm.

Posušje is relatively calm, with an average annual wind speed of 10km/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 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently spring in Posušje, which began on March 20, 2026. Posušje 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 29°C, while the coldest stretch bottoms out in January near -2°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Posušje is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 68mm per month. By contrast, January can be quite cold with temperatures dropping to -2°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Posušje 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.