Reykjavik, where it's located

The climate of Reykjavik is subpolar oceanic, with cold winters and very cool summers.
The city is the capital of Iceland and is located on the south-western coast.
The average temperature of the coldest month (January) is of 0 °C (32 °F), that of the warmest months (July, August) is of 11.5 °C (53 °F). The lowest record is -19.7 °C (-3.5 °F), set in January 1971, the highest is 25.7 °C (78 °F), set in July 2008. When a cold wave hits Europe, temperatures in Iceland get abnormally mild, and in Reykjavík they can reach 8/9 °C (46/48 °F), as happened in February 1956, in January 1985, in February 2012, and in February 2018. Here are the average temperatures.
Reykjavik - Average temperatures
Min (°C)-2-2-214799620-2
Max (°C)23361012141411743
Min (°F)282828343945484843363228
Max (°F)363737435054575752453937

Precipitation amounts to 800 millimeters (31.5 inches) per year: so, it is at an intermediate level. It ranges from 45 mm (1.8 in) in the driest month (May) to 85 mm (3.3 in) in the wettest (October). Here is the average precipitation.
Reykjavik - Average precipitation

On average, there are around 1,310 sunshine hours per year. So, the sun doesn't shine often. Here are the average sunshine hours per day.
Reykjavik - Sunshine

The sea temperature ranges between 5 °C (41 °F) and 10 °C (50 °F). So, it is very cold all year round. Here are the average sea temperatures.
Reykjavik - Sea temperature
Temp (°C)65556810109876
Temp (°F)434141414346505048464543


Best Time

The best time to visit Reykjavik is the summer, from June to August, since it is the mildest season. However, there are often cloudy skies, rain and a bit of cold at night.
In Reykjavik, the white nights, when the sun goes below the horizon but remains close enough, so much so that there are sunset lights even at midnight, occur from May 20 to July 23, although some faint lights around midnight are visible from late April and until mid-August.