Postojna
City in Slovenia
Postojna is a city in Slovenia with a population of 9605 in 2020. Located 38 km from the capital Ljubljana, the city draws visitors with its notable underground and architectural sights.
What to see
The city is known for two primary attractions. Visitors can explore Postojna Cave and the nearby cliffside Predjama Castle.
When to go
January and February are the coldest months with daily highs of 3 °C to 4 °C and lows of -4 °C. July and August are the warmest months, reaching daily highs of 23 °C to 24 °C and lows of 14 °C. Monthly rainfall ranges from 94 mm in February to 176 mm in October, with May experiencing the highest number of rainy days at about 19 days.
Getting there
The nearest airport is Ljubljana Jože Pučnik Airport in Zgornji Brnik, located 53 km away. Postojna is also 38 km from the capital city of Ljubljana.
Top sights in Postojna
Weather by month
The warmest month is July, with an average high of 24 °C. Rain is spread fairly evenly through the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | 3 | 4 | 9 | 13 | 18 | 21 | 24 | 23 | 19 | 14 | 8 | 4 |
| Average low, °C | -4 | -3 | 0 | 4 | 9 | 12 | 14 | 14 | 10 | 7 | 2 | -2 |
| Rainfall, mm | 99 | 94 | 118 | 128 | 133 | 151 | 103 | 133 | 164 | 176 | 170 | 158 |
| Rainy days | 10 | 10 | 11 | 11 | 19 | 15 | 16 | 14 | 13 | 12 | 13 | 9 |
Temperatures and rainfall: 1981–2010 averages for Postojna (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.