🇮🇸Iceland

Iceland spans 63°23′–66°31′N, a North Atlantic island nation covering roughly 103,000 km² just south of the Arctic Circle. The interior is dominated by a volcanic plateau with active volcanoes including Hekla, Katla, Eyjafjallajökull, Grímsvötn, Bárðarbunga, and the ongoing Reykjanes peninsula and Fagradalsfjall fissure eruptions, alongside vast ice caps—Vatnajökull at 8,100 km² is Europe's largest.

The Highlands plateau rises across the center, while the coastline cuts deep fjords. The highest peak, Hvannadalshnúkur at 2,110 m, crowns Vatnajökull's southern rim. The climate is overwhelmingly subpolar oceanic (Köppen Cfc), extraordinarily mild for the latitude thanks to the warm Irminger Current branch of the North Atlantic Drift, with ice cap conditions (EF) atop major glaciers and tundra (ET) across the highland interior.

Reykjavík averages 0°C in January and 11°C in July with around 800 mm annual rainfall, persistent low cloud, fog, and frequent gales. Akureyri in the more sheltered northeast records 0°C in January and 11°C in July with 480 mm precipitation. Höfn í Hornafirði on the southeast coast beneath Vatnajökull sees 1°C in January and 11°C in July with 1,400 mm rainfall, while Vík í Mýrdal on the exposed south coast registers 2°C in January and 11°C in July with an exceptional 2,300 mm, making it Iceland's wettest weather station.

The highland interior averages around −5°C with deep winter snowpack, and the Vatnajökull summit drops to −10°C. The all-time temperature range spans approximately −38°C at Grímsstaðir in January 1918 to 30.5°C at Teigarhorn in June 1939. Major climate events include the severe 1973 Eldfell volcanic eruption on Heimaey island, the massive 1996 Skeiðarárjökull jökulhlaup glacial outburst flood, the famous 2010 Eyjafjallajökull eruption that disrupted global aviation, the prolonged 2014–15 Holuhraun lava eruption, the ongoing Reykjanes peninsula and Sundhnúksgígar–Grindavík volcanic episodes from 2021 through 2024, accelerating glacier retreat with Okjökull declared officially dead in 2014, intensifying winter Atlantic storms, and the rare 2008 Reykjavík summer heatwave.

Our archive covers 0 Icelandic cities with daily ERA5 reanalysis data going back to 1940.