Rotterdam weather in May
May in Rotterdam: nice, a little rain, with very humid — an excellent time to visit.
#5 of 12 months in Rotterdam · #396 of 897 destinations to visit in May · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Rotterdam in May
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Rotterdam climate normals — May
| Daytime high | 17°C / 62°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 47°F | |
| Rainfall | 55 mm / 2.1 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 15.7 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 52 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Rotterdam in May — FAQ
- Is May a good time to visit Rotterdam?
- May in Rotterdam: nice, a little rain, with very humid — an excellent time to visit. It ranks #5 of 12 months for Rotterdam on SeasonMap's comfort score (84/100).
- What is the weather like in Rotterdam in May?
- In May, Rotterdam averages a daily high of 16.5°C and a low of 8.5°C, with about 54.5 mm of rain over roughly 10.6 rainy days.
- What is the air quality in Rotterdam in May?
- Rotterdam has a mean US Air Quality Index of about 52 in May.