Early autumn · Weather & things to do
Ljubljana in September
The year's rain peaks now, with about 4.6 in (118 mm) falling in Ljubljana, alongside highs near 71°F (22°C) and lows of 52°F (11°C).
At 80/100 for comfort (4th of 12), it's one of the best months to visit.
- Avg high
- 71°F (22°C)
- Avg low
- 52°F (11°C)
- Rain
- 4.6 in (118 mm)
- Humidity
- 77%
- Cloud cover
- 63%
- Daylight
- ~12 h 18 min
- Comfort score
- 80/100 · Great
What September feels like
Warm afternoons near 71°F (22°C) make long days outdoors easy.
After dark, temperatures fall to about 52°F (11°C).
Showers are part of the month, adding up to about 4.6 in (118 mm).
Plan around September
September is one of Ljubljana's best months on the climate data.
- Last warm month for a while: October highs fall to 61°F.
- Start of the wettest three-month stretch (September – November), which brings about 13.0 in (331 mm) in total.
- Last of the best-scoring months: by October, the score drops to 75/100.
- Comfort slips from 84/100 in August to 80/100.
- September sits inside the May – Sep window our Slovenia’s Alpine Lakes route recommends.
What to pack for September
- Light, breathable clothes71°F afternoons
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Ljubljana in September
September is good outdoor weather here, so these picks lean toward the open air.
Odprta kuhna
Friday open-air food market with dozens of Slovenian cooks and chefs on Pogačar Square.
Why now September scores 80/100 for comfort, good conditions for being outside.
Triple Bridge
Plečnik's trio of bridges linking Prešeren Square to the old town.
Why now Highs near 71°F and 4.6 in of monthly rain make this an easy outdoor pick.
Metelkova Mesto
Former army barracks turned graffiti-covered alternative arts and nightlife center.
Dvorni Bar
Wine bar near Congress Square with a long list of Slovenian wines by the glass.
Why now One to do outside while the weather is on your side.
Central Market
Open-air and covered market along Plečnik's riverside colonnade.
Nearby in September
- Lake Bled in September~29 mi · highs 69°F, 4.9 in rain · 1°C (2°F) cooler by day, about as wet
- Piran in September~58 mi · highs 75°F, 4.4 in rain · 2°C (4°F) warmer by day, about as wet
- Hallstatt in September~112 mi · highs 67°F, 5.2 in rain · 2°C (4°F) cooler by day, about as wet
- Cortina d'Ampezzo in September~118 mi · highs 62°F, 3.9 in rain · 5°C (9°F) cooler by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~598 m to Ljubljana's ~306 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Ljubljana in September: quick answers
Is September a good time to visit Ljubljana?
Yes. On the climate data it's one of the best months, scoring 80/100. Expect highs of 71°F (22°C) and 4.6 in (118 mm) of rain. September is inside the May – Sep window our Slovenia’s Alpine Lakes route recommends.
How hot is Ljubljana in September?
Average highs are 71°F (22°C) and average lows 52°F (11°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Ljubljana in September?
Some: about 4.6 in (118 mm) of rain falls across September on average, the wettest month of the year. The annual total is about 41.5 in (1054 mm).
What should I pack for Ljubljana in September?
Bring light, breathable clothes (71°F afternoons), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
More on Ljubljana
Routes in season in September
- Slovenia’s Alpine Lakes May – Sep
Planning Ljubljana in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.