Reykjavík Weather in May
Reykjavík in May sees low temperatures, with highs around 11°C (52°F) and overnight lows of 4°C (39°F). Rainfall is fairly high at around 97 mm (3.8 in) on average, so pack waterproofs just in case.
Rainfall in Reykjavík in May
Typically around 16 days of rainfall are expected, averaging 97 mm (3.8 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Reykjavík in May
May in Reykjavík brings low temperatures, with highs of 11°C (52°F) and nights around 4°C (39°F). The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Reykjavík in May
The days are predominantly sunny, with an estimated total of around 201 hours of sunshine. Despite the cool temperatures, these sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Reykjavík in May
May has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in May
The water temperature is only 8°C (46°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.If you prefer enjoying temperate temperatures and rain-free days, June and July typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Reykjavík's climate page.
Reykjavík Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
11°C (52°F)
Water Temperature
8°C (46°F)
Chance of Rain
52%
Precipitation
97 mm (3.8 in)
Rainy days
16 days
Humidity
76%
Windspeed
5 m/s (10 knots)
Sunshine
201 hours
Percentage Sunshine
35%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Reykjavík typically rise from around 7°C (45°F) at the start of May to approximately 11°C (52°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 6°C (43°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Reykjavík in May
Browse day-by-day weather records for Reykjavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Reykjavík historical weather extremes in May
Based on weather observations in Reykjavík between 1976 and 2025, these are the recorded extremes during May.
- The warmest day in May was on May 15, 1988, with a maximum of 20°C (68°F).
- The lowest daytime temperature in May was -2°C (28°F), recorded on May 3, 1982.
- The coldest night in May in Reykjavík was on May 5, 1982, with a minimum of -7°C (19°F).
Best Places in Iceland in May
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Reykjavík in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 8°C (46°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Reykjavík in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iceland, check out our Reykjavík's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Reykjavík climate overview or explore weather in Iceland.
