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.
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 Grundarfjordur's climate page.
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% *
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 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
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tolerable
unpleasant
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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.
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 Grundarfjordur's climate page.
Temperature Rainfall Sunshine Humidity
See the full Grundarfjordur climate overview or explore weather in Iceland.
