The climate in Grindavík during December can be summarized as cold and damp.
December is in the winter in Grindavík and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a freezing 2°C (36°F), whilst at night -3°C (27°F) is normal.
|Daytime temperature||2.2°C 36°F|
|Nightly temperature||-2.6°C 27.3°F|
|Average temperature||-0.2°C 31.6°F|
|Daily sunshine||0.5 hrs|
|Avg rainfall||111 mm 4.4 ins|
|Rainy days||20 days|
|Sea temperature||7.4°C 45.3°F|
|Windspeed||25.2kph 16 mph|
On average December is the 2nd wettest month of the year in Grindavík with around 111mm 4.4 inches of rain making it a damp time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 0.5 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grindavík in December 2021.
|Hottest month:||July||12.8°C 55°F|
|Driest month:||July||67mm 2.6ins|
|Coldest month:||January||1.7°C 35.1°F|
|Wettest month:||October||124mm 4.9ins|