The climate in Grindavík during May can be summarized as cool and reasonably dry.
May is in the spring in Grindavík and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 9°C (48°F), whilst at night 4°C (38°F) is normal.
|Daytime temperature||8.9°C 48°F|
|Nightly temperature||3.5°C 38.3°F|
|Average temperature||6.2°C 43.2°F|
|Daily sunshine||3 hrs|
|Avg rainfall||68 mm 2.7 ins|
|Rainy days||16 days|
|Sea temperature||7.7°C 45.8°F|
|Windspeed||19.8kph 12 mph|
On average May is the 2nd driest month of the year in Grindavík with around 68mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 3 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 May 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|