Stykkishólmur Weather in May

Stykkishólmur in May sees low temperatures, with highs around 9°C (48°F) and overnight lows of 4°C (39°F). Rainfall is fairly high at around 77 mm (3 in) on average, so pack waterproofs just in case.

Rainfall in Stykkishólmur in May

You can expect rain on roughly 13 days based on historical data, averaging 77 mm (3 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 Stykkishólmur in May

May in Stykkishólmur sees highs of 9°C (48°F) and lows of 4°C (39°F) overnight. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Stykkishólmur in May

The city usually sees around 182 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Stykkishólmur in May

Average wind conditions reach 5 m/s (10 knots) in May. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in May

The water temperature is only 7°C (45°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 dry days with pleasant temperatures, May may not be the ideal month to visit Stykkishólmur. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Iceland, check out our Stykkishólmur's climate page.

Stykkishólmur Temperature in May

Min Temperature 4°C (39°F)  

Max Temperature 9°C (48°F)  

Water Temperature 7°C (45°F)  

Chance of Rain 43%  

Precipitation 77 mm (3 in)  

Rainy days 13 days  

Humidity 78%  

Windspeed 5 m/s (10 knots)  

Sunshine 182 hours  

Percentage Sunshine 32%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Stykkishólmur typically rise from around 6°C (43°F) at the start of May to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from 0°C (32°F) to 5°C (41°F).

Average temperatures in May

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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

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Historical weather for Stykkishólmur in May

Browse day-by-day weather records for Stykkishólmur spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Stykkishólmur historical weather extremes in May

According to our 29 years of weather records for Stykkishólmur, the following extremes were recorded between 1997 and 2026.

• The hottest May day on record in Stykkishólmur reached 21°C (70°F) (May 18, 2025).
• Stykkishólmur experienced its chilliest May day on May 1, 2003, reaching only 0°C (32°F).
• The lowest overnight temperature recorded in May was -7°C (19°F) (May 12, 2019).
• The heaviest May precipitation occurred on May 11, 2009, when 44 mm (1.7 in) of precipitation fell.

What to Wear in Stykkishólmur in May

Cold weather calls for smart layering in May. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 7°C (45°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Stykkishólmur in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

4/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Iceland, check out our Stykkishólmur's climate page.

More climate data for Stykkishólmur

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Stykkishólmur climate overview or explore weather in Iceland.