December weather forecast
Keflavík International Airport, Iceland

In December, Keflavík International Airport registers a cold average monthly sea temperature of 6.6°C (43.9°F), marking the advent of the coldest season. Daylight hours dwindle quite significantly, often resulting in a fair share of gloomy days. The cold, crisp air mixed with the dull and often snowy landscape gives December its unique charm. Consider warm, layered clothing to fend off the chill during this period. However, the scarcity of daylight is countered by the captivating northern lights illuminating the dark skies, making for an awe-inspiring spectacle to round up the year.

Sea temperature

In Keflavík International Airport, the average seawater temperature in December is 6.6°C (43.9°F).
Note: While a brief time in 6.6°C (43.9°F) at 13°C (55.4°F) is already bracing, plunging below 10°C (50°F) can severely affect breathing and introduce a cold shock, relying on your physical state.

Daylight

With an average of 4h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 10:47 and sunset at 15:51. On the last day of December, in Keflavík International Airport, sunrise is at 11:19 and sunset at 15:47 GMT.