What is the weather like in Ljubljana in September?

Expect temperatures between 11°C and 21°C with 29% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Ljubljana in September?

Ljubljana in September scores 64/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Ljubljana in September?

September in Ljubljana is ideal for: Cultural tourists, Business travelers.

Ljubljana Weather in September | 30-Year Forecast

Avg High

21°C

Hottest around day 1

Avg Low

11°C

Coolest around day 30

Rainy Days

23days

29% avg rain chance

Sunshine

8hrs/day

Autumn season

Essential Travel Info for Ljubljana

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Slovene

Driving

Right side

Connect

As of 2025, Ljubljana has excellent 5G a...

Safety

Very High Safety

GPI: 1.316

Travel Intelligence

Exclusive flight analytics & health data for Ljubljana

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Remote

13/ 100

Traffic Index

Off the beaten path

Peak Daily Arrivals

slots per day

Peak

Jul

Low

Jan

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Traffic Level

Low Season

Key Connections

Belgrade Nikola Tesla (BEG)

Frankfurt-am-Main (FRA)

Munich (MUC)

Zurich Kloten (ZRH)

Amsterdam Schiphol (AMS)

Health & Safety Advisory

CDC travel health recommendations

7 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Slovenia.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Slovenia. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Slovenia.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Slovenia.If rabies exposures occur while in Slovenia, rabies vaccines may only be available in larger suburban/urban medical facilities.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Tick-borne Encephalitis

For travelers moving or traveling toTBE-endemic areasTBE vaccineis recommended for persons who will haveextensiveexposure to ticks based on their planned outdoor activities and itinerary.TBE vaccine may be considered for persons who might engage in outdoor activities in areas ticks are likely to be found.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Ljubljana?

👌Good option with minor considerations(64/100)

Short Answer

Ljubljana shines in September with 21°C pleasant temperatures and minimal 29% rain chance. Expect 8.7 hours of sunshine daily - pack light layers for evenings.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

80% average humidity

Ideal temperature range

20.8°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Crimean-Congo Hemorrhagic fever, Leishmaniasis

Plenty of sunshine

8.7h of sunshine daily

Shoulder season - balanced conditions

81% of peak - good value with moderate crowds

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

👴
Elderly travelers
80% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Ljubljana in September averages 21°C with 29% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Ljubljana in September

What are the temperatures in Ljubljana in September?

Daytime highs average 21°C, nights drop to 11°C. Temperatures remain fairly consistent.

How many rainy days in Ljubljana in September?

Expect around 23 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Ljubljana in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Ljubljana?

This is shoulder season—moderate prices and manageable crowds.

Ljubljana Weather in September

Ljubljana September Weather Calendar