Seyðisfjörður Weather in December
Thinking of visiting Seyðisfjörður in December? Expect very low temperatures reaching 1°C (34°F) during the day, dropping to -6°C (21°F) at night, and note that quite a bit of snow/rainfall is likely.
Rainfall in Seyðisfjörður in December
Snow/rain is expected on roughly 18 days, totalling around 148 mm (5.8 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 Seyðisfjörður in December
Expect highs of 1°C (34°F) in Seyðisfjörður in December, with nights dropping to around -6°C (21°F). During December, the winter season is in full swing. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. Nights are well below freezing at -6°C (21°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. With temperatures often at their lowest, it is the coldest month of the year. Ideal for indoor activities, be sure to pack warm clothing.December in Seyðisfjörður can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
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 Seyðisfjörður's climate page.
Seyðisfjörður Temperature in December
Min Temperature
-6°C (21°F)
Max Temperature
1°C (34°F)
Chance of Rain
59%
Precipitation
148 mm (5.8 in)
Rainy days
18 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seyðisfjörður typically stay consistent throughout December, with daily highs averaging around 1°C (34°F). Nights are very cold, with lows typically ranging from -4°C (25°F) to -1°C (30°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 for Seyðisfjörður in December
Browse day-by-day weather records for Seyðisfjörður spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seyðisfjörður historical weather extremes in December
The extremes listed below come from historical weather data collected in Seyðisfjörður from 1976 through 2025.
- The hottest December day on record in Seyðisfjörður reached 16°C (61°F) (December 3, 2019).
- On December 22, 2010, Seyðisfjörður saw its coldest December day with temperatures maxing out at -13°C (9°F).
- Nighttime temperatures dropped to -23°C (-9°F) on December 22, 2010, 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
What to Wear in Seyðisfjörður in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Seyðisfjörður in December
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 Seyðisfjörður's climate page.
See the full Seyðisfjörður climate overview or explore weather in Iceland.
