Reykjavik Weather in May
In May, Reykjavik averages a high of 9°C (49°F) and a low of 4°C (39°F), based on 56 years of historical weather data from REYKJAVIK.
9°C
Average high
49°F
4°C
Average low
39°F
22°C
Record high
71°F · 2025
-8°C
Record low
18°F · 1982
What to Expect in Reykjavik in May
Typical May days in Reykjavik reach 9°C (49°F) during the afternoon and cool to around 4°C (39°F) overnight. On average, measurable rain falls on about 53% of days this month. Over the past 56 years, May temperatures in Reykjavik have ranged from a record high of 22°C (2025) down to a record low of -8°C (1982).
For a day-by-day look or other months, see the full Reykjavik weather history.