Climate averages 1991–2020
Ljubljana weather
in May.
A mild, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Ljubljana: daytime highs average 19.3°C and nights cool to about 9.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 103 mm of rain on roughly 13 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 56 min on an average May day.
The nearest other city in this atlas is Klagenfurt am Wörthersee (66 km away). In May its highs average 18.9°C, about as warm as Ljubljana, with 119 mm of rain.
Among the 2 cities listed in Slovenia, Ljubljana ranks 2nd of 2 for the warmest May highs and 2nd of 2 for the driest May (rainfall, lowest first). The mean May high of those 2 cities is 19.8°C; Ljubljana is 0.5°C cooler than that mean.
From May to June, average highs rise by 3.9°C to 23.2°C, and monthly rainfall rises from 103 mm to 105 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ljubljana climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.7°C-2.7°C | -2.7°C | 59 | 8.0 | 9.19 h |
| February | 5.7°C-2.3°C | -2.3°C | 75 | 8.5 | 10.310 h |
| March | 10.3°C1.3°C | 1.3°C | 76 | 10.1 | 11.912 h |
| April | 15.1°C5.3°C | 5.3°C | 90 | 12.0 | 13.514 h |
| May, selected | 19.3°C9.7°C | 9.7°C | 103 | 13.4 | 14.915 h |
| June | 23.2°C13.6°C | 13.6°C | 105 | 13.4 | 15.716 h |
| July | 25.3°C15.8°C | 15.8°C | 95 | 11.3 | 15.415 h |
| August | 25.2°C15.9°C | 15.9°C | 112 | 11.1 | 14.214 h |
| September | 19.8°C11.5°C | 11.5°C | 125 | 11.1 | 12.613 h |
| October | 14.6°C7.3°C | 7.3°C | 117 | 10.2 | 11.011 h |
| November | 9.1°C3.1°C | 3.1°C | 121 | 11.2 | 9.510 h |
| December | 4.3°C-1.9°C | -1.9°C | 90 | 9.2 | 8.79 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Klagenfurt am Wörthersee in MayAustria · 66 kmHigh 18.9°C · Low 9.4°C · 119 mm rain
- Trieste in MayItaly · 72 kmHigh 20.6°C · Low 12.3°C · 122 mm rain
- Rijeka in MayCroatia · 81 kmHigh 20.7°C · Low 12.6°C · 120 mm rain
- Udine in MayItaly · 98 kmHigh 20.0°C · Low 10.2°C · 115 mm rain
- Maribor in MaySlovenia · 104 kmHigh 20.4°C · Low 10.6°C · 99 mm rain
- Zagreb in MayCroatia · 117 kmHigh 21.2°C · Low 10.8°C · 87 mm rain
- Graz in MayAustria · 134 kmHigh 19.0°C · Low 8.3°C · 85 mm rain
- Bihać in MayBosnia and Herzegovina · 174 kmHigh 20.5°C · Low 10.4°C · 127 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ljubljana) is explained once on the Ljubljana year overview and on the Sources, method and limits page.