Reykjavik is the world's northernmost capital with only around 1300 sunshine hours per year and 800 mm of annual precipitation spread evenly across all months. Thanks to the Gulf Stream, winters are surprisingly mild with January averages of -1°C, while summers remain cool with July averages of 12°C. Explore historical weather data for Reykjavik and experience Iceland's subarctic island climate.
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The period comparison for Reykjavik sits at the top of this page. Pick two time windows that interest you, for example the same month across two different years, and the tool puts maximum and minimum temperature, sunshine hours, precipitation, and peak wind side by side. The “Climate Trend Reykjavik” link above offers a different lens: up to ten years of the same month in a single chart.
The monthly weather review gives you a third perspective. Instead of comparing two periods, you land on a single month page with context from previous years. That is particularly useful when you want to know whether a specific month in Reykjavik stood out or tracked a familiar pattern.
All values on this page come from the ECMWF ERA5 reanalysis dataset, a global archive that merges satellite and surface measurements into a gap-free time series. For Reykjavik that means: data from 1 January 1940, day by day, without gaps. The series is calibrated and extended daily with new observations.
Because ERA5 reconciles measurements retroactively against the full observation network, values stay comparable whether you set two adjacent years or 1970 against 2026 side by side. The comparison is free and ad-free. Maximum temperature, minimum temperature, precipitation, sunshine hours, and peak wind each follow the same rule: one value per day, one point on the map, one source.