Iceland Airwaves Festival
On its way to its 20th edition in 2019 Iceland Airwaves is a festival you need to visit once in your life. Everything from lagoons and bookstores to bars and concert halls is filled with music.
Grundarfjordur Weather in May
Grundarfjordur in May averages 8°C (46°F) during the day and 4°C (39°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Grundarfjordur in May
Based on our climate data of the past 30 years, about 14 days of rain are anticipated, with 74 mm (2.9 in) on average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Grundarfjordur in May
In May, Grundarfjordur gets low temperatures, with highs of 8°C (46°F). Nights cool to around 4°C (39°F). The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Grundarfjordur in May
The area enjoys a moderate level of sunlight, with around 182 hours. It's a good balance between sunny and cloudy days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Grundarfjordur.
Grundarfjordur Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
8°C (46°F)
Chance of Rain
45%
Precipitation
74 mm (2.9 in)
Rainy days
14 days
Humidity
78% *
Sunshine
182 hours *
Percentage Sunshine
32% *
* Data from: Stykkishólmur, Iceland (30 KM, 19 Miles).
Grundarfjordur Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grundarfjordur - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Grundarfjordur typically rise from around 6°C (43°F) at the start of May to approximately 9°C (48°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 records for Grundarfjordur in May
Browse day-by-day weather records for Grundarfjordur spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grundarfjordur historical weather extremes in May
The extremes listed below come from historical weather data collected in Grundarfjordur from 1976 through 2026.
- Grundarfjordur recorded its highest May temperature of 20°C (68°F) on May 17, 2025.
- Grundarfjordur experienced its chilliest May day on May 2, 1982, reaching only -4°C (25°F).
- Grundarfjordur registered its coldest May night on May 3, 1979, with temperatures dropping to -6°C (21°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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Grundarfjordur 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. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Grundarfjordur in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling4/10 -
Walking4/10 -
Camping4/10 -
Outdoor sports4/10
Grundarfjordur 3-Day Forecast
More climate data for Grundarfjordur
Temperature Rainfall Sunshine Humidity
See the full Grundarfjordur climate overview or explore weather in Iceland.
Popular in May
Where to go in May - average daytime high across popular destinations.
Hella
12°C (54°F) Reykjavík
11°C (52°F) Kópavogur11°C (52°F) Selfoss11°C (52°F) Keflavík9°C (48°F) Höfn
8°C (46°F) Akureyri
6°C (43°F) Egilsstadir7°C (45°F) Bucket list
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