Trieste weather in May
May in Trieste: nice, soaked, with clean air — fine if you can take 17 rainy days.
#3 of 12 months in Trieste · #362 of 897 destinations to visit in May · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
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Trieste climate normals — May
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Rainfall | 161 mm / 6.3 in | ⛈ soaked |
| Rainy days | 17 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.9 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Trieste in May — FAQ
- Is May a good time to visit Trieste?
- May in Trieste: nice, soaked, with clean air — fine if you can take 17 rainy days. It ranks #3 of 12 months for Trieste on SeasonMap's comfort score (85/100).
- What is the weather like in Trieste in May?
- In May, Trieste averages a daily high of 19.8°C and a low of 12.2°C, with about 160.8 mm of rain over roughly 17.2 rainy days.
- What is the air quality in Trieste in May?
- Trieste has a mean US Air Quality Index of about 50 in May.