Climate averages 1991–2020
Ljubljana weather
in April.
A mild, wet month: the 6th warmest and the joint 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Ljubljana: daytime highs average 15.1°C and nights cool to about 5.3°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 90 mm of rain on roughly 12 days, which makes April a wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 31 min on an average April day.
The nearest other city in this atlas is Klagenfurt am Wörthersee (66 km away). In April its highs average 14.5°C, 0.6°C cooler than Ljubljana, with 96 mm of rain.
Among the 2 cities listed in Slovenia, Ljubljana ranks 2nd of 2 for the warmest April highs and 2nd of 2 for the driest April (rainfall, lowest first). The mean April high of those 2 cities is 15.7°C; Ljubljana is 0.5°C cooler than that mean.
From April to May, average highs rise by 4.2°C to 19.3°C, and monthly rainfall rises from 90 mm to 103 mm.
The annual picture
April 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, selected | 15.1°C5.3°C | 5.3°C | 90 | 12.0 | 13.514 h |
| May | 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
April in nearby cities
- Klagenfurt am Wörthersee in AprilAustria · 66 kmHigh 14.5°C · Low 4.9°C · 96 mm rain
- Trieste in AprilItaly · 72 kmHigh 16.4°C · Low 7.8°C · 110 mm rain
- Rijeka in AprilCroatia · 81 kmHigh 16.5°C · Low 8.1°C · 114 mm rain
- Udine in AprilItaly · 98 kmHigh 15.7°C · Low 5.5°C · 104 mm rain
- Maribor in AprilSlovenia · 104 kmHigh 16.2°C · Low 5.9°C · 71 mm rain
- Zagreb in AprilCroatia · 117 kmHigh 16.9°C · Low 6.1°C · 67 mm rain
- Graz in AprilAustria · 134 kmHigh 15.0°C · Low 3.6°C · 54 mm rain
- Bihać in AprilBosnia and Herzegovina · 174 kmHigh 16.3°C · Low 6.0°C · 110 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.