Blue Lagoon Weather & Climate: Best Time to Visit

The climate in Blue Lagoon experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a moderate 14°C (57°F) in July to a chilly 5°C (41°F) in February.

Nighttime temperatures range from 10°C (50°F) in July to 0°C (32°F) in February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Blue Lagoon experiences significant rain/snowfall throughout the year, averaging 1427 mm (56 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, September, sees around 149 mm (5.9 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, June, still receives a respectable 79 mm (3.1 in) of rainfall. For more details, please visit our Blue Lagoon Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Blue Lagoon, summer days are longer and more sunny, with daily sunshine hours peaking at 6.7 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 0.7 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Blue Lagoon.

The city experiences its highest humidity in July, reaching 81%. In May, the humidity drops to its lowest level at 76%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year