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Blue Lagoon Weather in December
December in Blue Lagoon averages 5°C (41°F) during the day and 1°C (34°F) at night. Quite a bit of rainfall is typical this month, with around 141 mm (5.6 in) on average. An umbrella is a good idea.
Rainfall in Blue Lagoon in December
Typically, about 20 days will experience rainfall, with an average of 141 mm (5.6 in) for the month. 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 Blue Lagoon in December
If you're visiting Blue Lagoon in December, expect highs of 5°C (41°F) and overnight lows around 1°C (34°F). Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights fall to 1°C (34°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Blue Lagoon in December
The area sees fewer sunny days, with a projection of about 20 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Blue Lagoon. Our weather planner can help you explore destinations with more pleasant weather conditions.
Blue Lagoon Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
5°C (41°F)
Chance of Rain
68%
Precipitation
141 mm (5.6 in)
Rainy days
20 days
Humidity
79% *
Sunshine
20 hours *
Percentage Sunshine
15% *
* Data from: Reykjavík, Iceland (38 KM, 24 Miles).
Blue Lagoon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Blue Lagoon - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Blue Lagoon 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 Blue Lagoon in December
Browse day-by-day weather records for Blue Lagoon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Blue Lagoon historical weather extremes in December
Our historical data for Blue Lagoon spans 1976 to 2025, revealing these weather extremes.
- Blue Lagoon recorded its highest December temperature of 10°C (50°F) on December 11, 2009.
- On December 19, 1989, Blue Lagoon saw its coldest December day with temperatures maxing out at -8°C (18°F).
- Nighttime temperatures dropped to -12°C (10°F) on December 30, 2022, 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 Blue Lagoon in December
Dress warmly and in layers for your trip to Blue Lagoon 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 Blue Lagoon 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
Blue Lagoon 3-Day Forecast
More climate data for Blue Lagoon
Temperature Rainfall Sunshine Humidity
See the full Blue Lagoon 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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