Precipitation in Reykjavík measured 115.8 millimeters in June, the highest since records began in 1920 and more than three times the June average, according to the Icelandic Met Office.
Elsewhere in Iceland, rainfall was generally below average, such as in Akureyri and Vestmannaeyjar, where rainfall measured 24.2 mm and 67 mm, respectively.
Meanwhile, wind speed was at its lowest. Last month was the least windy June measured at manned stations since 1963, and at automatic ones it was the lowest June on record.
Hours of sunshine in Reykjavík totaled just 115 in June, 96 hours below the average of the past ten years. The capital also saw little sunshine in June last year with just 121 hours of sunshine.
The average temperature in Reykjavík was surprisingly high, or 11.2ºC (52ºF), making it the fourth warmest June since records began in 1871.