Garðabær Weather in December
December in Garðabær sees daytime temperatures around 4°C (39°F) and lows of -2°C (28°F) at night. With around 138 mm (5.4 in) of snow/rainfall expected, it's worth packing a rain jacket.
Rainfall in Garðabær in December
Historically, the month has about 20 days of snow/rain, averaging 138 mm (5.4 in) in total. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Garðabær in December
In December, Garðabær sees low temperatures, with highs of 4°C (39°F). Nights drop to around -2°C (28°F). December is typically considered a winter month. Time outdoors is usually more comfortable with proper winter clothing and protection from wind. With overnight lows of -2°C (28°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. This month is particularly chilly, so wearing layers is necessary to stay warm and comfortable.
Sunshine in Garðabær in December
The area experiences limited sunny days, amounting to roughly 20 hours of sunshine. This makes it perfect for those who lean towards cooler, cloudier settings rather than intense sunlit days.
Wind Speed in Garðabær in December
Average wind conditions reach 6 m/s (12 knots) in December. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.
Average water temperature in December
The water temperature is only 7°C (45°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.December in Garðabær has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations 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 Garðabær's climate page.
Garðabær Temperature in December
Min Temperature
-2°C (28°F)
Max Temperature
4°C (39°F)
Water Temperature
7°C (45°F) *
Chance of Rain
65%
Precipitation
138 mm (5.4 in)
Rainy days
20 days
Humidity
79% *
Windspeed
6 m/s (12 knots) *
Sunshine
20 hours *
Percentage Sunshine
15% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Garðabær 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 for Garðabær in December
Browse day-by-day weather records for Garðabær spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Garðabær historical weather extremes in December
Our historical data for Garðabær spans 1976 to 2025, revealing these weather extremes.
- The hottest December day on record in Garðabær reached 11°C (52°F) (December 14, 1997).
- The coldest December day was on December 30, 2022, with a maximum of -9°C (16°F).
- The lowest overnight temperature recorded in December was -14°C (7°F) (December 30, 2022).
- The wettest December day on record brought 56 mm (2.2 in) of precipitation to Garðabær (December 30, 2007).
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 Garðabær in December
Dress warmly and in layers for your trip to Garðabær 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. Expect water temperatures of around 7°C (45°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Garðabær 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 Garðabær's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Garðabær climate overview or explore weather in Iceland.
