Ljubljana weather in May
May in Ljubljana: nice, soaked, with clean air — an excellent time to visit.
#5 of 12 months in Ljubljana · #339 of 604 destinations to visit in May · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Ljubljana climate normals — May
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 49°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 160 mm / 6.3 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 15 h | |
| Wind | 13 km/h / 8 mph | |
| Snowfall | 0.1 cm / 0 in | |
| Air quality (US AQI) | 47 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Ljubljana?
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Ljubljana in May — FAQ
- Is May a good time to visit Ljubljana?
- May in Ljubljana: nice, soaked, with clean air — an excellent time to visit. It ranks #5 of 12 months for Ljubljana on SeasonMap's comfort score (80/100).
- What is the weather like in Ljubljana in May?
- In May, Ljubljana averages a daily high of 18°C and a low of 9.2°C, with about 159.8 mm of rain over roughly 18 rainy days.
- What is the air quality in Ljubljana in May?
- Ljubljana has a mean US Air Quality Index of about 47 in May.