Reykjavik Weather in December
Iceland · Subarctic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
December in Reykjavik sees average temperatures ranging from a low of -3.3°C (26.1°F) to a high of 1.1°C (34.0°F), with a mean of -1.0°C (30.2°F). Compared to the annual average of 4.5°C (40.1°F), this month is 5.5°C cooler than the yearly norm. This is the coldest month of the year, with average lows of -3.3°C (26.1°F). Precipitation averages 131.0mm, making it approximately 0.0mm wetter than the monthly average of 130.0mm. The city receives an average of 0.7 hours of sunshine per day during December, with relative humidity averaging 76.8%. Wind speeds reach an average maximum of 24.2 km/h. Snowfall averages 48.3cm during December, which can affect travel plans and outdoor activities. For travelers, this month offers a coldest month of the year experience in Reykjavik, with wetter-than-average conditions compared to the rest of the year.
Planning around Reykjavik's daylight is more important than temperature. I was there in June and the midnight sun meant I could hike at 11pm — disorienting but incredible. December gives you about 4 hours of daylight, which limits outdoor plans severely. The data shows mild temperatures for the latitude (rarely below -5°C thanks to the Gulf Stream), but wind chill is the real factor. Pack windproof everything, regardless of season.
December vs Adjacent Months
| Metric | November | December | January |
|---|---|---|---|
| Mean Temp | 2.4°C (36.3°F) | -1.0°C (30.2°F) | -0.5°C (31.1°F) |
| Rainfall | 135.1mm | 131.0mm | 156.7mm |
| Sunshine | 2.2 hrs | 0.7 hrs | 1.4 hrs |
| Humidity | 79.9% | 76.8% | 76.6% |
| Wind | 25.9 km/h | 24.2 km/h | 28.0 km/h |
| Rainy Days | 19.0 | 11.8 | 14.4 |
| Snowfall | 18.5 cm | 48.3 cm | 39.4 cm |
Seasonal Context
December falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Reykjavik in December, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Reykjavik in December?
The average temperature in Reykjavik during December ranges from -3.3°C (26.1°F) to 1.1°C (34.0°F), with a mean of -1.0°C (30.2°F).
How much does it rain in Reykjavik in December?
Reykjavik receives an average of 131.0mm of precipitation in December, spread across approximately 11.8 rainy days.
What should I pack for Reykjavik in December?
Based on December weather data, pack heavy winter clothing, thermal layers, and a warm coat. Rain gear is essential — this month averages 131.0mm of precipitation.
Is December a good time to visit Reykjavik?
December is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Reykjavik
Cities with Similar December Climate (Subarctic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 64.15°, -21.94°. Timezone: Atlantic/Reykjavik. Last updated: 2026-07-30.