Keflavík
December
Weather in Keflavík for December 2025
Your guide to Keflavík weather in December - trends and predictions
Expect heavy snowfall in Keflavík during December, with an average of 17 snowy days.
In general, the average temperature in Keflavík at the beginning of December is 3.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 1.6 °C by the end of December.
Snow Forecast ❄️
Temperatures
10
Dry days
4
Rainy days
17
Snow days
3°/0°
Temperatures
45 km/h
Avg max wind
71 %
Avg humidity
Keflavík in December average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  1° | 2  4° | 3  4° | 4  5° | 5  4° | 6 3° | 7  2° |
| 8 5° | 9 6° | 10 4° | 11  5° | 12 6° | 13  4° | 14  6° |
| 15 5° | 16 5° | 17 4° | 18 3° | 19 5° | 20  6° | 21  2° |
| 22 1° | 23  4° | 24 2° | 25 1° | 26 3° | 27 2° | 28 2° |
| 29 0° | 30 2° | 31 1° |
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Temperatures trend during December in Keflavík
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Dec. | Sunny | 1° /-2° | 0 mm | 0 cm | |
| 2 Dec. | Overcast | 4° /-2° | 8.7 mm | 0.7 cm | |
| 3 Dec. | Moderate snow | 4° /1° | 4.9 mm | 0.8 cm | |
| 4 Dec. | Heavy snow | 5° /1° | 17.8 mm | 7.5 cm | |
| 5 Dec. | Cloudy | 4° /1° | 7.2 mm | 5 cm | |
| 6 Dec. | Sunny | 3° /0° | 0.4 mm | 0.3 cm | |
| 7 Dec. | Partly cloudy | 2° /0° | 0 mm | 0 cm | |
| 8 Dec. | Sunny | 5° /2° | 5.4 mm | 0 cm | |
| 9 Dec. | Sunny | 6° /2° | 1.9 mm | 0 cm | |
| 10 Dec. | Cloudy | 4° /2° | 0.6 mm | 0 cm | |
| 11 Dec. | Moderate or heavy snow showers | 5° /3° | 5.5 mm | 0.3 cm | |
| 12 Dec. | Heavy snow | 6° /1° | 4.6 mm | 0.1 cm | |
| 13 Dec. | Light sleet showers | 4° /2° | 10.4 mm | 0 cm | |
| 14 Dec. | Blizzard | 6° /1° | 6.8 mm | 1.1 cm | |
| 15 Dec. | Light sleet showers | 5° /2° | 7.8 mm | 0.6 cm | |
| 16 Dec. | Light sleet showers | 5° /3° | 5.6 mm | 1.2 cm | |
| 17 Dec. | Moderate or heavy snow showers | 4° /2° | 6 mm | 1.5 cm | |
| 18 Dec. | Moderate or heavy snow showers | 3° /0° | 1.8 mm | 0.5 cm | |
| 19 Dec. | Light sleet showers | 5° /0° | 12.5 mm | 0 cm | |
| 20 Dec. | Light rain shower | 6° /0° | 3.4 mm | 0.6 cm | |
| 21 Dec. | Light snow showers | 2° /-1° | 0.9 mm | 0.3 cm | |
| 22 Dec. | Moderate or heavy snow showers | 1° /-2° | 1.5 mm | 0.8 cm | |
| 23 Dec. | Light snow | 4° /-2° | 8.8 mm | 0 cm | |
| 24 Dec. | Patchy light snow | 2° /-2° | 3.1 mm | 0 cm | |
| 25 Dec. | Cloudy | 1° /-1° | 5.2 mm | 0 cm | |
| 26 Dec. | Moderate or heavy snow showers | 3° /0° | 9.9 mm | 1.2 cm | |
| 27 Dec. | Heavy snow | 2° /0° | 10.5 mm | 3.5 cm | |
| 28 Dec. | Light snow | 2° /-1° | 1.8 mm | 0.2 cm | |
| 29 Dec. | Partly cloudy | 0° /-3° | 1.6 mm | 0 cm | |
| 30 Dec. | Moderate or heavy snow showers | 2° /-2° | 7.6 mm | 4.1 cm | |
| 31 Dec. | Overcast | 1° /-1° | 5 mm | 0 cm | |
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Important Notice
Our weather forecast for Keflavík in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Keflavík forecast closer to your planned date for the most up-to-date weather information.
Keflavík in December - FAQ
What are the expected maximum and minimum temperatures in Keflavík during December?
Brace for cold days with temperatures not exceeding 3° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Keflavík during December?
Significant rainfall exceeding 141.6 mm is expected in Keflavík during December, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Keflavík in December 2025?
Keflavík experiences an average snowfall of 30.985 cm during December, occurring over 17 days.
What are the typical wind conditions in Keflavík during December?
The average wind speed in Keflavík during December is 45 km/h, suggesting breezy to windy conditions, depending on your activities.
Keflavík snow forecast December 2025
Track daily snowfall levels and discover Keflavík’s snowy potential this December ❄️
December rainfall patterns in Keflavík
Explore the daily rainfall trends and prepare for Keflavíks December weather 💧
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