Heraklion weather in May
May in Heraklion: warm, dry, with clean air — an excellent time to visit.
#5 of 12 months in Heraklion · #97 of 604 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Heraklion climate normals — May
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 61°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 22 mm / 0.9 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 12.4 h/day | |
| Daylight | 14 h | |
| Wind | 12 km/h / 8 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Heraklion?
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Heraklion in May — FAQ
- Is May a good time to visit Heraklion?
- May in Heraklion: warm, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Heraklion on SeasonMap's comfort score (89/100).
- What is the weather like in Heraklion in May?
- In May, Heraklion averages a daily high of 25.7°C and a low of 16.1°C, with about 22.2 mm of rain over roughly 4.8 rainy days.
- What is the air quality in Heraklion in May?
- Heraklion has a mean US Air Quality Index of about 49 in May.