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Weather & Climate in Hellissandur, Iceland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hellissandur has a cool climate with an average annual temperature of 39°F (4°C). Winters average 31°F in January while summers reach 50°F in July / relatively mild seasonal variation. The area gets 263 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 40.0 inches. The area receives 23.2 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 3 feet.
Temperature
31°F Jan (-1°C)
50°F Jul (10°C)
| Annual Average | 38.5°F |
| 29% below US avg | |
| January Average | 31°F (-1°C) |
| July Average | 50°F (10°C) |
| Sunny Days | 263 days/yr |
Geography
| Elevation | 3 ft (1 m) |
| Area | 98.1 sq mi (254.0 km²) |
| Population Density | 6/sq mi |
| Coordinates | 64.9176°N, 23.8856°W |
| Timezone | Atlantic/Reykjavik |
Precipitation & Snow
Air Quality
Earthquake History
117 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Feb 24, 2021 | 6 km SE of Vogar, Iceland | M5.6 | 132 km | 10 km |
| Jul 31, 2022 | 3 km SSE of Vogar, Iceland | M5.4 | 130 km | 10 km |
| Mar 7, 2021 | 11 km ENE of Vogar, Iceland | M5.3 | 129 km | 10 km |
| Mar 14, 2021 | 9 km SW of Álftanes, Iceland | M5.3 | 129 km | 10 km |
| Aug 23, 2003 | 9 km SE of Vogar, Iceland | M5.2 | 136 km | 10 km |
| Jul 9, 2023 | 9 km SW of Álftanes, Iceland | M5.2 | 127 km | 5 km |
| Feb 27, 2021 | 8 km SW of Álftanes, Iceland | M5.2 | 128 km | 10 km |
| Apr 1, 2025 | 6 km NW of Grindavík, Iceland | M5.2 | 132 km | 10 km |
| Mar 10, 2021 | 9 km SW of Álftanes, Iceland | M5.1 | 128 km | 10 km |
| Aug 2, 2022 | 1 km SSE of Hafnarfjörður, Iceland | M5.0 | 134 km | 10 km |
| Mar 1, 2021 | 5 km SW of Álftanes, Iceland | M4.9 | 127 km | 10 km |
| May 24, 2025 | 23 km W of Grindavík, Iceland | M4.9 | 128 km | 10 km |
| Apr 1, 2025 | 9 km WNW of Grindavík, Iceland | M4.9 | 133 km | 4 km |
| Jun 17, 2000 | 9 km ENE of Vogar, Iceland | M4.9 | 130 km | 10 km |
| Mar 19, 1990 | 18 km ENE of Grindavík, Iceland | M4.8 | 144 km | 10 km |
| Aug 1, 2022 | 10 km SW of Hafnarfjörður, Iceland | M4.8 | 134 km | 10 km |
| Feb 24, 2021 | 10 km SSW of Álftanes, Iceland | M4.8 | 131 km | 10 km |
| Oct 13, 2013 | 16 km SW of Grindavík, Iceland | M4.8 | 145 km | 10 km |
| May 29, 2009 | 9 km SE of Vogar, Iceland | M4.8 | 136 km | 5 km |
| Feb 24, 2021 | 5 km E of Vogar, Iceland | M4.8 | 129 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Helgrindur (29 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Helgrindur | Pyroclastic cone(s) | 986 m (3,235 ft) | Unknown | 29 km |
| Ljosufjoll | Fissure vent(s) | 1,063 m (3,488 ft) | 960 | 66 km |
| Reykjanes | Crater rows | 140 m (459 ft) | 1831 | 135 km |
| Krysuvik | Crater rows | 360 m (1,181 ft) | 1340 | 144 km |
| Brennisteinsfjoll | Crater rows | 610 m (2,001 ft) | 1341 | 149 km |
| Hengill | Crater rows | 803 m (2,635 ft) | 150 | 150 km |
| Hromundartindur | Stratovolcano | 550 m (1,804 ft) | Unknown | 153 km |
| Prestahnukur | Subglacial | 1,385 m (4,544 ft) | -3350 | 157 km |
| Grimsnes | Crater rows | 200 m (656 ft) | -3500 | 173 km |
| Langjokull | Subglacial | 1,100 m (3,609 ft) | 950 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-1°C) | 3.8 in | Coldest |
| February | 31°F (-0°C) | 4.3 in | |
| March | 31°F (-1°C) | 4.0 in | |
| April | 35°F (2°C) | 2.7 in | |
| May | 41°F (5°C) | 2.4 in | |
| June | 46°F (8°C) | 1.9 in | |
| July | 50°F (10°C) | 1.9 in | Warmest, Driest |
| August | 49°F (9°C) | 3.0 in | |
| September | 44°F (7°C) | 3.3 in | |
| October | 38°F (4°C) | 4.4 in | Wettest |
| November | 35°F (1°C) | 4.3 in | |
| December | 32°F (-0°C) | 4.1 in |
Hellissandur has a seasonal temperature swing of 19°F / from 31°F in January to 50°F in July. Total annual precipitation is 40.0 inches, with October being the wettest month (4.4") and July the driest (1.9").