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Selfoss Weather in December
December in Selfoss averages 4°C (39°F) during the day and -2°C (28°F) at night. Quite a bit of snow/rainfall is typical this month, with around 171 mm (6.7 in) on average. An umbrella is a good idea.
Rainfall in Selfoss in December
You can expect snow/rain on around 19 days based on historical patterns, with 171 mm (6.7 in) average 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 Selfoss in December
In December, Selfoss gets low temperatures, with highs of 4°C (39°F). Nights cool to around -2°C (28°F). December is known for being in the winter season. Expect a distinctly cold feel throughout the day, not just overnight. Nights drop below freezing to -2°C (28°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. Known for its cold temperatures, this month requires warm clothing. Ensure you dress appropriately to stay comfortable.
Sunshine in Selfoss in December
The city usually sees around 20 hours of sunlight, indicating fewer sunny days.December in Selfoss has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Selfoss Temperature in December
Min Temperature
-2°C (28°F)
Max Temperature
4°C (39°F)
Chance of Rain
62%
Precipitation
171 mm (6.7 in)
Rainy days
19 days
Humidity
79% *
Sunshine
20 hours *
Percentage Sunshine
15% *
* Data from: Reykjavík, Iceland (48 KM, 30 Miles).
Selfoss Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Selfoss - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Selfoss 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 -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 records for Selfoss in December
Browse day-by-day weather records for Selfoss spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Selfoss historical weather extremes in December
According to our 49 years of weather records for Selfoss, the following extremes were recorded between 1976 and 2025.
- On December 5, 2002, temperatures climbed to 11°C (52°F), marking the warmest December day on record.
- The coldest December day was on December 30, 2022, with a maximum of -10°C (14°F).
- Selfoss registered its coldest December night on December 30, 2022, with temperatures dropping to -20°C (-4°F).
- The wettest December day on record brought 58 mm (2.3 in) of precipitation to Selfoss (December 12, 1993).
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 Selfoss 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. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You can probably leave your sunglasses at home, because sunny days are pretty rare this month.
What To Do in Selfoss 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 -
Camping1/10 -
Outdoor sports3/10
Selfoss 3-Day Forecast
More climate data for Selfoss
Temperature Rainfall Sunshine Humidity
See the full Selfoss 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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