Ljubljana in September
7.1out of 10
Possible, with caveats
Mild: highs around 20°C. Frequent rain: about 11 rainy days.
20°CAvg high
11°CAvg low
11Rainy days (125 mm)
12:18 hDaylight
06:47Sunrise · 19:06 Sunset
Why this score
- Mild: highs around 20°C
- Frequent rain: about 11 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 4°C | -2°C | 59 mm | 8 | – | – | 4.7 |
| February | 6°C | -2°C | 75 mm | 8 | – | – | 5.1 |
| March | 10°C | 1°C | 76 mm | 10 | – | – | 5.8 |
| April | 15°C | 5°C | 90 mm | 12 | – | – | 6.3 |
| May | 19°C | 10°C | 103 mm | 13 | – | – | 6.8 |
| June | 23°C | 13°C | 105 mm | 13 | – | – | 7.2 |
| July | 25°C | 15°C | 95 mm | 11 | – | – | 7.5 |
| August | 25°C | 15°C | 113 mm | 11 | – | – | 7.5 |
| September | 20°C | 11°C | 125 mm | 11 | – | – | 7.1 |
| October | 15°C | 7°C | 117 mm | 10 | – | – | 6.4 |
| November | 9°C | 3°C | 121 mm | 11 | – | – | 5.3 |
| December | 4°C | -2°C | 90 mm | 9 | – | – | 4.7 |
Frequently asked questions
How hot is Ljubljana in September?
Daytime highs average 20°C and nights about 11°C.
When is the best time to visit Ljubljana?
The best months are July, August, June, September.