Southern Peninsula (Keflavík)
December
Weather in Southern Peninsula for December 2025
Your guide to Southern Peninsula weather in December - trends and predictions
Expect heavy snowfall in Southern Peninsula during December, with an average of 17 snowy days.
In general, the average temperature in Southern Peninsula 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
Southern Peninsula in December average weather
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| 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 Southern Peninsula
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 Southern Peninsula 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 Southern Peninsula forecast closer to your planned date for the most up-to-date weather information.
Southern Peninsula in December - FAQ
What are the expected maximum and minimum temperatures in Southern Peninsula 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 Southern Peninsula during December?
Significant rainfall exceeding 141.6 mm is expected in Southern Peninsula during December, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Southern Peninsula in December 2025?
Southern Peninsula experiences an average snowfall of 30.985 cm during December, occurring over 17 days.
What are the typical wind conditions in Southern Peninsula during December?
The average wind speed in Southern Peninsula during December is 45 km/h, suggesting breezy to windy conditions, depending on your activities.
Southern Peninsula snow forecast December 2025
Track daily snowfall levels and discover Southern Peninsula’s snowy potential this December ❄️
December rainfall patterns in Southern Peninsula
Explore the daily rainfall trends and prepare for Southern Peninsulas December weather 💧
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