Postojna Cave and Predjama Castle - Entrance Tickets Included
4.81,179 reviews6h
from €114
Check availabilityBest months
May, June, and September
Warmest month
July, 29°C
Wettest month
September, 181 mm
Ljubljana weather by month
Average daily high and low, total rainfall and days with at least 2.5 mm of rain.
| Month | High / low | Rain | Verdict |
|---|---|---|---|
| January | 5°C / -1°C | 85 mm · 6 days | Cold |
| February | 8°C / 0°C | 96 mm · 7 days | Cold |
| March | 13°C / 3°C | 96 mm · 7 days | Fair |
| April | 18°C / 7°C | 86 mm · 7 days | Fair |
| May | 22°C / 11°C | 131 mm · 10 days | Good |
| June | 27°C / 15°C | 112 mm · 7 days | Great |
| July | 29°C / 17°C | 132 mm · 8 days | Fair |
| August | 28°C / 16°C | 130 mm · 7 days | Fair |
| September | 23°C / 12°C | 181 mm · 8 days | Great |
| October | 17°C / 8°C | 128 mm · 7 days | Fair |
| November | 10°C / 4°C | 126 mm · 8 days | Cold |
| December | 5°C / 0°C | 110 mm · 7 days | Cold |
Ljubljana by season
Spring
Spring sees the city bursting into life with blooming flowers in Tivoli Park and along the river. Temperatures are mild, perfect for walking, and the tourist crowds are still manageable before the peak season.
- + Pleasant weather for exploration
- + Vibrant green spaces and fewer crowds
- + Outdoor cafes begin to open
- − Some rain showers are common
- − Lake Bled day trips can still be chilly
Summer
Warm, sunny days with long evenings define a Ljubljana summer. The city is at its most lively, with packed riverside terraces, numerous festivals, and a buzzing street scene. The heat can be intense in the afternoon.
- + Vibrant festival season and nightlife
- + Perfect for al fresco dining and river activities
- + Ideal for combining city and lake/outdoor trips
- − Peak tourist crowds and higher prices
- − Can be quite hot, especially in July and August
Autumn
Autumn brings stunning fall foliage to Tivoli Park and the surrounding hills. The air is crisp, the summer crowds have dissipated, and it's harvest season, making it a fantastic time for food and wine enthusiasts.
- + Beautiful autumn colors, especially in parks
- + Excellent for food and wine tourism
- + Comfortable temperatures and fewer tourists
- − Days get shorter and rain increases later in the season
- − Some outdoor cafes close
Winter
Winter is cold and often foggy, but it has a quiet, magical charm. The Christmas markets on Preseren Square are enchanting, and a dusting of snow on the castle creates a fairy-tale scene. It's a cozy, festive time.
- + Charming Christmas markets throughout December
- + Atmospheric, crowd-free sightseeing
- + Proximity to ski resorts in the Alps
- − Short daylight hours and often gray, cold weather
- − Some attractions have reduced hours
Ljubljana month by month
Ljubljana in January
ColdIn January, Ljubljana averages highs of 5°C and lows of -1°C, with about 6 rainy days and 85 mm of rain. It is cold, so pack warm layers.
Ljubljana in February
ColdIn February, Ljubljana averages highs of 8°C and lows of 0°C, with about 7 rainy days and 96 mm of rain. It is cold, so pack warm layers.
Ljubljana in March
FairIn March, Ljubljana averages highs of 13°C and lows of 3°C, with about 7 rainy days and 96 mm of rain. Expect mixed weather, with comfortable spells.
Ljubljana in April
FairIn April, Ljubljana averages highs of 18°C and lows of 7°C, with about 7 rainy days and 86 mm of rain. Expect mixed weather, with comfortable spells.
Ljubljana in May
GoodIn May, Ljubljana averages highs of 22°C and lows of 11°C, with about 10 rainy days and 131 mm of rain. It is a good month to visit.
Ljubljana in June
GreatIn June, Ljubljana averages highs of 27°C and lows of 15°C, with about 7 rainy days and 112 mm of rain. It is one of the most comfortable months for sightseeing.
Ljubljana in July
FairIn July, Ljubljana averages highs of 29°C and lows of 17°C, with about 8 rainy days and 132 mm of rain. Expect mixed weather, with comfortable spells.
Ljubljana in August
FairIn August, Ljubljana averages highs of 28°C and lows of 16°C, with about 7 rainy days and 130 mm of rain. Expect mixed weather, with comfortable spells.
Ljubljana in September
GreatIn September, Ljubljana averages highs of 23°C and lows of 12°C, with about 8 rainy days and 181 mm of rain. It is one of the most comfortable months for sightseeing.
Ljubljana in October
FairIn October, Ljubljana averages highs of 17°C and lows of 8°C, with about 7 rainy days and 128 mm of rain. Expect mixed weather, with comfortable spells.
Ljubljana in November
ColdIn November, Ljubljana averages highs of 10°C and lows of 4°C, with about 8 rainy days and 126 mm of rain. It is cold, so pack warm layers.
Ljubljana in December
ColdIn December, Ljubljana averages highs of 5°C and lows of 0°C, with about 7 rainy days and 110 mm of rain. It is cold, so pack warm layers.
Top tours and experiences in Ljubljana
The tours and tickets travellers book most, with ratings and reviews from Viator.
Slovenia in One Day: Small-Group Bled, Postojna Cave & Predjama
4.9947 reviews10h
from €115
Check availability
All things to do in Ljubljana →
Tours and prices from Viator, a Tripadvisor company. Prices change with your dates. We may earn a commission if you book, at no extra cost to you.
Plan your Ljubljana trip
Best time to visit Ljubljana: FAQ
What is the best month to visit Ljubljana?+
June is the most comfortable month on average, with highs of 27°C. September and May are close behind.
What is the rainiest month in Ljubljana?+
September is the wettest month, with about 181 mm of rain.
How hot does Ljubljana get?+
July is the warmest month, with average highs of 29°C and lows of 17°C. The coldest nights come in January, averaging -1°C.
Averages for 2006–2025 from the LJUBLJANA BEZIGRAD weather station (1 km from the centre), NOAA Global Historical Climatology Network. Verdicts rate sightseeing comfort from daytime highs and rainy days.