Reykjavík weather in May
May in Reykjavík: cold, rainy, with clean air — a great time to visit.
#4 of 12 months in Reykjavík · #420 of 604 destinations to visit in May · comfort 75/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Reykjavík climate normals — May
| Daytime high | 10°C / 50°F | 🧥 cold |
|---|---|---|
| Nighttime low | 4°C / 39°F | |
| Feels like (high) | 7°C / 45°F | |
| Rainfall | 103 mm / 4 in | 🌧 rainy |
| Rainy days | 18 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 4°C / 39°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 18.5 h | |
| Wind | 20 km/h / 12 mph | |
| Snowfall | 0.8 cm / 0.3 in | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Reykjavík in May — FAQ
- Is May a good time to visit Reykjavík?
- May in Reykjavík: cold, rainy, with clean air — a great time to visit. It ranks #4 of 12 months for Reykjavík on SeasonMap's comfort score (75/100).
- What is the weather like in Reykjavík in May?
- In May, Reykjavík averages a daily high of 9.9°C and a low of 3.7°C, with about 102.8 mm of rain over roughly 17.6 rainy days.
- What is the air quality in Reykjavík in May?
- Reykjavík has a mean US Air Quality Index of about 40 in May.