Ljubljana weather in September
“Mild and bright — an underrated time to visit.”
Roughly 12 rainy days across the month, on average.
In september, Ljubljana settles into its kind, mild rhythm. The city keeps a different pulse than in summer or midwinter, and travellers who arrive with the right expectations are rewarded.
Days average around 22°C (71°F), cooling to 12°C after sunset. Expect meaningful rain — some 12 wet days across the month. Pack accordingly and let the weather choose your afternoons. Long days of sunshine reward early starts.
These figures are climatological averages, drawn from a decade of daily records via the Open-Meteo Archive — not a forecast. But they are honest, and they are the sort of thing a good travel guide ought to tell you before you book the flight.
What to pack for Ljubljana in September
- •A light layer for cool mornings and evenings
- •A compact travel umbrella — one you'll actually carry
- •Reef-safe sunscreen and polarised sunglasses
- •Comfortable, broken-in walking shoes
- •A small daypack that won't look like a tourist beacon
What to pack for Ljubljana in September
- →Breathable travel pantsAmazon · shop this
- →Packable rain jacketAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Waterproof dry bagAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
We may earn a small commission on any purchase — it doesn't change the price you pay.
Where to stay in Ljubljana
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in Ljubljana across trusted platforms.
Compare hotels on Booking.com→Plan your Ljubljana trip
Handpicked services from partners we trust. One tab for everything you'll need after the flight is booked.
Compare rooms in Ljubljana on Booking.com.
Skip-the-line tickets, day trips, food walks and guided tours.
Compare fares across airlines with Skyscanner.
Instant data on arrival — no roaming charges, no SIM swap.
Flexible monthly coverage for trips of any length.
Compare 25 brands worldwide with free cancellation.
Book a driver in advance — fixed price, no queue.
We may earn a commission if you book through these links, at no cost to you.
Other places with a similar climate right now
Ljubljana in September — FAQ
Q01Is September a good month for Ljubljana?
Is September a good month for Ljubljana?
It is a fair time to visit — expect variable conditions and plan flexibility. In September, Ljubljana averages a high of 22°C (71°F) and a low of 12°C (53°F), with 148mm of rainfall across roughly 12 rainy days.
Q02How warm does Ljubljana get in September?
How warm does Ljubljana get in September?
The average high temperature in Ljubljana during September is 22°C (71°F), with an average low of 12°C (53°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive).
Q03Does it rain a lot in Ljubljana in September?
Does it rain a lot in Ljubljana in September?
Ljubljana averages approximately 12 rainy days in September, with a total monthly rainfall of about 148mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What clothes should I bring to Ljubljana in September?
What clothes should I bring to Ljubljana in September?
For Ljubljana in September, pack layered clothing for changing temperatures, a compact umbrella or waterproof jacket, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on 11 complete years of weather averages for this specific month.
Q05Are there many tourists in Ljubljana in September?
Are there many tourists in Ljubljana in September?
Tourist crowds in Ljubljana during September are typically moderate — shoulder season, a sweet spot between crowds and weather. Consider this when planning accommodation — prices track crowd levels closely.