Ljubljana climate — normals and trends
Ljubljana (Slovenia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 1,162 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (19.3 °C on average) and the coldest is January (-0.9 °C). Rainfall peaks in November.
Ljubljana averages 89 frost days, 6 hot days (≥ 30 °C) and 135 rainy days per year.
Ljubljana has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 110 to 68 per year over the period.
The hottest day of the period reached 36.8 °C (on 4 August 2013) and the coldest -30.2 °C (on 15 February 1940).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
LjubljanaLjubljana
- coords
- 46.05°, 14.51°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
13.7°C
Average daily low
5.6°C
Annual rainfall
1,162mm
Sunshine / day
8.0h
Mean relative humidity
79%
Average peak wind
11.4km/h
Seasonal range
20.2°C
Frost days (< 0 °C)
89 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
135 d/yr
Annual snowfall
113.0 cm
Average feels-like high
12.2 °C
Average feels-like low
3.7 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.64 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.8 °C
4 August 2013
Coldest day
-30.2 °C
15 February 1940
Wettest day
73 mm
25 September 1973
Windiest day
32.6 km/h
5 March 2015
Strongest gust
90.4 km/h
21 May 1984
Hottest feels-like
38.7 °C
27 July 1983
Coldest feels-like
-34.7 °C
15 February 1940
Snowiest day
30.5 cm
8 December 1965
Sunniest day
15.0 h
22 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 6.0 °C | +3.7 °C | 75 mm | +8 mm |
| Feb | 4.9 °C | +0.3 °C | 59 mm | -14 mm |
| Mar | 11.8 °C | +2.6 °C | 166 mm | +84 mm |
| Apr | 16.2 °C | +2.2 °C | 72 mm | -28 mm |
| May | 18.2 °C | -0.3 °C | 119 mm | +12 mm |
| Jun | 27.3 °C | +5.1 °C | 20 mm | -92 mm |
| Jul | 25.2 °C | +0.8 °C | 134 mm | +35 mm |
| Aug | 25.4 °C | +1.4 °C | 81 mm | -23 mm |
| Sep | 20.9 °C | +1.1 °C | 136 mm | +26 mm |
| Oct | 14.3 °C | 0.0 °C | 90 mm | -15 mm |
| Nov | 9.2 °C | +1.2 °C | 126 mm | +9 mm |
| Dec | 5.6 °C | +2.1 °C | 33 mm | -55 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ljubljana?
Ljubljana has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 1,162 mm of precipitation per year.
What is the hottest day ever recorded in Ljubljana?
The hottest day measured in Ljubljana between 1940 and 2025 was 4 August 2013, reaching 36.8 °C.
What is the coldest day in Ljubljana?
The coldest day measured in Ljubljana between 1940 and 2025 was 15 February 1940, at -30.2 °C.
Does it snow in Ljubljana?
Yes. Ljubljana gets on average 113.0 cm of snow per year and has around 89 frost days.
Has the climate of Ljubljana warmed?
Yes: Ljubljana warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ljubljana?
The wettest day measured in Ljubljana between 1940 and 2025 was 25 September 1973, with 73 mm of rain in 24 hours.
What was the windiest day in Ljubljana?
The windiest day measured in Ljubljana between 1940 and 2025 was 5 March 2015, with winds reaching 32.6 km/h.
What is the warmest month in Ljubljana?
The warmest month in Ljubljana is July (19.3 °C on average); the coldest is January (-0.9 °C).
How much does it rain in Ljubljana?
Ljubljana receives on average 1,162 mm of precipitation per year, spread over about 135 rainy days.
Is it sunny in Ljubljana?
Ljubljana gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ljubljana?
The heaviest 24-hour snowfall measured in Ljubljana between 1940 and 2025 was 8 December 1965, with 30.5 cm.
Are there tropical nights in Ljubljana?
Yes: Ljubljana has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ljubljana?
In Ljubljana, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 27 July 1983, and the lowest was -34.7 °C on 15 February 1940.
Compare Ljubljana with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ljubljana