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Grundarfjordur Weather in December
December in Grundarfjordur averages 4°C (39°F) during the day and 0°C (32°F) at night. Quite a bit of rainfall is typical this month, with around 126 mm (5 in) on average. An umbrella is a good idea.
Rainfall in Grundarfjordur in December
The climate data from previous years indicates about 19 days of rain, averaging 126 mm (5 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Grundarfjordur in December
Expect highs of 4°C (39°F) in Grundarfjordur in December, with nights dropping to around 0°C (32°F). It stays very cold throughout much of the day, so warm winter clothing is essential. With lows around 0°C (32°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep. This month is extremely cold, so be sure to dress in layers to keep warm. Proper preparation can help you stay comfortable.
Sunshine in Grundarfjordur in December
The city usually sees around 9 hours of sunlight, indicating fewer sunny days.If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Grundarfjordur. Our weather planner can help you explore destinations with more pleasant weather conditions.
Grundarfjordur Temperature in December
Min Temperature
0°C (32°F)
Max Temperature
4°C (39°F)
Chance of Rain
63%
Precipitation
126 mm (5 in)
Rainy days
19 days
Humidity
80% *
Sunshine
9 hours *
Percentage Sunshine
7% *
* 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 stay consistent throughout December, with daily highs averaging around 4°C (39°F). Nights are very cold, with lows typically ranging from -3°C (27°F) to 0°C (32°F).
Average temperatures in December
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 December
Historical weather records for Grundarfjordur in December
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 December
Based on 47 years of weather observations (1978-2025), these are the most extreme conditions recorded in Grundarfjordur.
- On December 13, 2001, temperatures climbed to 13°C (55°F), marking the warmest December day on record.
- The lowest daytime temperature in December was -9°C (16°F), recorded on December 20, 1989.
- Nighttime temperatures dropped to -13°C (9°F) on December 24, 2004, marking the coldest December night on record.
Best Places in Iceland in December
Find out more about the weather in Iceland and which places have the best travel conditions in this month. See all of Iceland in December →
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 December
Dress warmly and in layers for your trip to Grundarfjordur in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.
What To Do in Grundarfjordur in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling3/10 -
Walking3/10 -
Camping3/10 -
Outdoor sports3/10
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 December
Where to go in December - average daytime high across popular destinations.
Keflavík
5°C (41°F) Hella4°C (39°F) Selfoss4°C (39°F) Kópavogur4°C (39°F) Höfn4°C (39°F) Reykjavík4°C (39°F) Akureyri
0°C (32°F) Egilsstadir0°C (32°F) Bucket list
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