Iceland Airwaves Festival
On its way to its 20th edition in 2019 Iceland Airwaves is a festival you need to visit once in your life. Everything from lagoons and bookstores to bars and concert halls is filled with music.
Keflavík Weather in December
During December, Keflavík experiences low daytime temperatures of 5°C (41°F) and cooler nights around 1°C (34°F). Expect quite a bit of rainfall. Around 139 mm (5.5 in) is typical.
Rainfall in Keflavík in December
Climate statistics over the past 30 years suggest around 20 days of rain, with 139 mm (5.5 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 Keflavík in December
Temperatures in Keflavík in December top out at 5°C (41°F) and drop to 1°C (34°F) overnight. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With overnight lows of 1°C (34°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Keflavík in December
This month is characterized by fewer sunny days, with about 20 hours of sunshine. It's great for those who appreciate cooler, less sunny days.December in Keflavík 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.
Keflavík Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
5°C (41°F)
Chance of Rain
67%
Precipitation
139 mm (5.5 in)
Rainy days
20 days
Humidity
79% *
Sunshine
20 hours *
Percentage Sunshine
15% *
* Data from: Reykjavík, Iceland (34 KM, 21 Miles).
Keflavík Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Keflavík - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Keflavík typically stay consistent throughout December, with daily highs averaging around 5°C (41°F). Nights are very cold, with lows typically ranging from -2°C (28°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 Keflavík in December
Browse day-by-day weather records for Keflavík spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Keflavík historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Keflavík.
- The warmest day in December was on December 11, 2009, with a maximum of 10°C (50°F).
- On December 19, 1989, Keflavík saw its coldest December day with temperatures maxing out at -8°C (18°F).
- The coldest night in December in Keflavík was on December 10, 2011, with a minimum of -12°C (10°F).
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 Keflavík in December
Dress warmly and in layers for your trip to Keflavík 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. With limited sunshine expected, sunglasses aren't a priority for packing.
What To Do in Keflavík in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming4/10 -
Cycling3/10 -
Walking3/10 -
Camping3/10 -
Outdoor sports3/10
Keflavík 3-Day Forecast
More climate data for Keflavík
Temperature Rainfall Sunshine Humidity
See the full Keflavík 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
Need travel inspiration? Check out our bucket list articles and be inspired.
Iceland Airwaves Festival
Where to stay in Iceland: Nordic idyll that feels like home
If you are travelling to Iceland for the first time, the Golden Circle will probably make it onto your bucket list. Geysir Hestar is located right in between two spectacular sights of the Golden Circle.
See the northern lights
The northern lights, polar light or Aarora Borealis is a true spectacle of nature! Green, sometimes purple, red and yellow streaks of light colors the dark skies.
The 10 most charming villages in France
Discover France's top 10 beautiful villages. From Normandy to the Côte d'Azur, experience quaint squares and cobbled streets. Which one will you visit this summer?