Ljubljana, Slovenia is most comfortable in February, March, April. The toughest month for heat is July (comfort 48/100). In August, daytime highs average 27.3°C (feels like 28.8°C) with 8.6 days over 30°C and 0.2 tropical nights.
| Month | Avg high | Avg low | Feels like | Days ≥30°C | Days ≥35°C | Nights ≥20°C | Comfort |
|---|---|---|---|---|---|---|---|
| January | 5.7° | -2.7° | 2.8° | 0 | 0 | 0 | 94 |
| February | 9.1° | -1.3° | 6° | 0 | 0 | 0 | 100 |
| March | 12.6° | 0.5° | 9.7° | 0 | 0 | 0 | 100 |
| April | 15.4° | 3.7° | 13.4° | 0 | 0 | 0 | 100 |
| May | 19.6° | 9.2° | 19.3° | 0 | 0 | 0 | 100 |
| June | 27° | 14.6° | 28.1° | 8 | 0.2 | 0.2 | 65 |
| July | 28.4° | 16.2° | 29.9° | 11.2 | 0.8 | 1.2 | 48 |
| August | 27.3° | 15.4° | 28.8° | 8.6 | 0.2 | 0.2 | 60 |
| September | 22.3° | 11.5° | 22.4° | 0.8 | 0 | 0 | 99 |
| October | 17.3° | 7.4° | 16.5° | 0 | 0 | 0 | 100 |
| November | 10.1° | 1.9° | 8° | 0 | 0 | 0 | 100 |
| December | 5.8° | -1.2° | 3.3° | 0 | 0 | 0 | 94 |
Destinations scoring 75+ for August heat comfort:
It's hot but manageable. August daytime highs in Ljubljana average 27.3°C with 8.6 days over 30°C. Plan outdoor sightseeing for mornings and evenings.
Based on 5 years of climate data, the most comfortable months in Ljubljana are February, March, April. The toughest month for heat is July, scoring 48/100 on our heat-comfort index.
In August, nights in Ljubljana average a low of 15.4°C, with 0.2 tropical nights per month (nights that stay at or above 20°C) — a key factor for sleep quality if your stay has no air conditioning.
Tell us where and when you're going. If a heatwave becomes likely for your dates, we'll email you early — with cooler day-by-day alternatives nearby.