Ljubljana climate
Ljubljana (Slovenia) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 11 °C52 °F, and about 1,051 mm41 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Ljubljana climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 440 | −327 | 133 | 602.4 |
| Feb | 642 | −228 | 235 | 732.9 |
| Mar | 1152 | 134 | 643 | 712.8 |
| Apr | 1661 | 642 | 1152 | 732.9 |
| May | 2170 | 1050 | 1560 | 963.8 |
| Jun | 2577 | 1458 | 2068 | 883.5 |
| Jul | 2781 | 1662 | 2271 | 833.3 |
| Aug | 2781 | 1661 | 2271 | 943.7 |
| Sep | 2271 | 1152 | 1662 | 1184.6 |
| Oct | 1662 | 745 | 1253 | 1044.1 |
| Nov | 1051 | 338 | 744 | 1094.3 |
| Dec | 542 | −130 | 236 | 853.3 |
| Year | 2781 | −327 | 1152 | 1,05141 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 91% | 72% | 1.3 | 9:01 |
| Feb | 88% | 72% | 2.1 | 10:17 |
| Mar | 83% | 66% | 3.3 | 11:46 |
| Apr | 78% | 65% | 4.4 | 13:29 |
| May | 76% | 69% | 5.2 | 14:56 |
| Jun | 75% | 64% | 5.8 | 15:44 |
| Jul | 71% | 59% | 5.9 | 15:24 |
| Aug | 70% | 56% | 5.0 | 14:08 |
| Sep | 77% | 63% | 3.6 | 12:28 |
| Oct | 85% | 66% | 2.4 | 10:49 |
| Nov | 90% | 74% | 1.4 | 9:22 |
| Dec | 91% | 73% | 1.1 | 8:39 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Ljubljana is like
The warmest month is July, with an average high of 27 °C81 °F and a low of 16 °C62 °F. The coldest is January, when highs average 4 °C40 °F and lows −3 °C27 °F. Seasons are strongly marked: the warmest month is on average 21.1 °C38.1 °F warmer than the coldest.
It is wet, with about 1,051 mm41 in of precipitation per year. Rain is spread fairly evenly through the year. The wettest month is September (118 mm4.6 in), the driest is January (60 mm2.4 in).
Relative humidity ranges from 70% in August to 91% in January. The clearest skies (lowest average cloud amount, 56%) are typical of August. Average wind speed near the ground ranges from 0 km/h (0 mph) in November to 2 km/h (1 mph) in February. Daylight lasts from about 8.7 hours in December to 15.7 hours in June.
Best time to visit Ljubljana
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–August: average highs of 21 °C70 °F to 27 °C81 °F with 83 mm3.3 in to 96 mm3.8 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 4 °C40 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Ljubljana
- Winter (December–February) — highs 440 to 6 °C42 °F, lows −327 to −1 °C30 °F, about 72 mm2.9 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1152 to 21 °C70 °F, lows 134 to 10 °C50 °F, about 80 mm3.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2577 to 27 °C81 °F, lows 1458 to 16 °C62 °F, about 88 mm3.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1051 to 22 °C71 °F, lows 338 to 11 °C52 °F, about 110 mm4.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
How Ljubljana compares
Compared with Zagreb, about 117 km to the east, Ljubljana has practically the same average temperature and receives 16% more precipitation (1,051 mm41 in vs 906 mm36 in). The difference is largest in July (1.3 °C2.3 °F cooler).
Places in other countries with the most similar temperature and rainfall pattern: Mitrovicë (Kosovo, Dfa), Sarajevo (Bosnia and Herzegovina, Cfb) and Lausanne (Switzerland, Cfb).
Nearby places
- Klagenfurt am Wörthersee 66 km · 10 °C51 °F · 1,060 mm42 in
- Trieste 72 km · 15 °C59 °F · 1,026 mm40 in
- Rijeka 81 km · 13 °C56 °F · 1,197 mm47 in
- Udine 98 km · 14 °C56 °F · 1,074 mm42 in
- Zagreb 117 km · 11 °C53 °F · 906 mm36 in
- Graz 134 km · 10 °C51 °F · 832 mm33 in
- Mestre 186 km · 15 °C59 °F · 943 mm37 in
- Padua 216 km · 15 °C58 °F · 879 mm35 in
Frequently asked questions
What is the warmest month in Ljubljana?
July is the warmest month in Ljubljana, with an average high of 27 °C (81 °F) and an average low of 16 °C (62 °F).
What is the coldest month in Ljubljana?
January is the coldest month, with an average high of 4 °C (40 °F) and an average low of -3 °C (27 °F).
When does it rain the most in Ljubljana?
September is the wettest month with about 118 mm (4.6 in) of precipitation; January is the driest with about 60 mm (2.4 in).
What is the best time to visit Ljubljana?
Judging by long-term averages, the most comfortable months are May–August.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 598 m, while Ljubljana lies at about 295 m. Temperatures on this page were therefore adjusted by +2 °C3.5 °F using the standard lapse rate of 6.5 °C per 1,000 m.