Things to do in Postojna in September

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Overview

September is a great time to visit Postojna. The weather is usually mildly cool, humid but cool, with temperatures ranging from 51—70°F (11—21°C). There are plenty of events to check out and activities to try in Postojna during this time. Some of our top recommendations: taste the seasonal truffles at a local restaurant, go on a guided tour of the Predjama Castle at sunset, go on a cycling tour of the Inner Carniola region, and more!

Postojna has plenty to offer for visitors of all ages and interests. In this article, we tell you the top things to see and do for your September trip to Postojna. Get inspired by the events, activities, attractions, and experiences unique to September. We’ll let you know where to explore events based on your interests, whether that’s food, culture, art, music, sport or others.

We’ll let you know everything you need to prepare for the weather in Postojna in September. Learn about what to wear and pack for your trip, the average temperatures throughout September, temperature changes from morning to evening and much more.

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Don't take our word for it
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Best events and things to do in Postojna in September

Top experiences in September
Taste the seasonal truffles at a local restaurant
September marks the beginning of truffle season in the Inner Carniola region, and many restaurants offer special dishes featuring these prized fungi. Whether you're a foodie or just looking to try something new, sampling truffles in September is a delicious and unique experience.
Go on a guided tour of the Predjama Castle at sunset
In September, the castle offers special evening tours that allow visitors to explore the medieval fortress as the sun sets over the picturesque Inner Carniola region. The combination of history and natural beauty makes this a must-see experience.
Go on a cycling tour of the Inner Carniola region
September offers pleasant weather for outdoor activities, and cycling is a great way to explore the picturesque landscapes of the area. Whether you're a casual rider or a seasoned cyclist, there are routes available for all skill levels.
Visit the Planina Cave and witness the unique underground formations
September is a great time to explore this lesser-known cave, as the summer crowds have subsided. The cave is home to a variety of stunning stalactites, stalagmites, and other geological formations that are sure to impress visitors.
Take a hot air balloon ride over the Inner Carniola region
September offers ideal weather for hot air ballooning, with clear skies and mild temperatures. Seeing the stunning landscapes of the region from above is a truly unforgettable experience that is sure to create lasting memories.
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Holidays in Postojna in September
September
  • Restoration of Primorska to the Motherland Day (September 15)
  • Slovenian Sports Day (September 23)
Other notable holidays
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Weather in Postojna in September

Temperatures on an average day in Postojna in September

The average temperature in Postojna in September for a typical day ranges from a high of 70°F (21°C) to a low of 51°F (11°C). Some would describe it as mildly cool, humid but cool.

For comparison, the hottest month in Postojna, August, has days with highs of 80°F (27°C) and lows of 58°F (15°C). The coldest month, January has days with highs of 38°F (4°C) and lows of 27°F (-3°C). This graph shows how an average day looks like in Postojna in September based on historical data.

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Historical temperature average in September
70°F
highs
51°F
lows

General weather summary

Mildly cool, humid but cool
Feels like
32%
Chance of rain
0.187 in
Amount
9.0 mph
Wind speed
76%
Humidity
12.6 hrs
Daylight length
6:39 AM
Sunrise
7:15 PM
Sunset
52%
Cloud cover
Sweater
What to wear
What to wear in September
With an average high of 70°F (21°C) and a low of 51°F (11°C), it generally feels mildly cool, humid but cool. There might also be a small chance of rain. With that in mind, most people would dress in something moderately warm like a sweater
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Best attractions for Postojna in September

Besides the array of exciting events and activities Postojna has to offer for travelers in September, we want to remind you of the classic attractions in Postojna that are great to visit at this time of the year as well! You can’t miss these iconic landmarks, local favorites, and places rich with cultural heritage. We hope to give you insights and inspiration into the best things to see and do to make the most of your visit. Here is a list of our top attractions in Postojna for September.
Postojna Cave Tiimncket Store
1. Postojna Cave Tiimncket Store
4.4
(94)
Event ticket seller
Nature & Parks
Predjama Castle
2. Predjama Castle
4.7
(20181)
Castle
Sights & Landmarks
13th-century castle built in cliff face cave, with restored living areas, dungeons & secret tunnel.
Pivka Jama
3. Pivka Jama
4.3
(1135)
RV park
Nature & Parks
Postojna Adventure Park
4. Postojna Adventure Park
4.5
(119)
Adventure sports center
Tours
Guštarna
5. Guštarna
4.7
(72)
Wine store
Shopping
Notranjski muzej Postojna
6. Notranjski muzej Postojna
4.9
(104)
Museum
Heritage museum
Planina Cave
7. Planina Cave
4.7
(398)
Nature & Parks
Caverns & Caves
Limestone cave & underground river with guided tours on foot & longer torchlit excursions by boat.
Tourist Information Centre - Galerija
8. Tourist Information Centre - Galerija
5.0
(19)
Tourist information center
Shopping
Stara dama, trgovina, galerija, gostinstvo, turizem, d.o.o.
9. Stara dama, trgovina, galerija, gostinstvo, turizem, d.o.o.
4.7
(7)
Museums
Military Museums
Best-of categories in Postojna

Looking for day-by-day itineraries in Postojna?

Get inspired for your trip to Postojna with our curated itineraries that are jam-packed with popular attractions everyday! Check them out here:

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