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Weather & Climate in Adak, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Adak has a cool climate with an average annual temperature of 40°F (4°C). Winters average 32°F in January while summers reach 48°F in July / relatively mild seasonal variation. The area gets 255 sunny days per year, above the national average. Annual precipitation totals 44.5 inches. The area receives 15.7 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 21 / among the cleanest air in the country. The city sits at an elevation of 150 feet.
Temperature
32°F Jan (0°C)
48°F Jul (9°C)
| Annual Average | 39.7°F |
| 26% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 48°F (9°C) |
| Sunny Days | 255 days/yr |
Geography
| Elevation | 150 ft (46 m) |
| Area | 68.2 sq mi (176.5 km²) |
| Population Density | 4/sq mi |
| Coordinates | 51.9099°N, 176.5981°W |
| Timezone | America/Anchorage |
| Nearest Airport | Ted Stevens Anchorage International (ANC) 1,186 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 21.0 |
| Rating | Good |
Earthquake History
10,290 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.9.
| Jun 10, 1996 | 77 km WSW of Adak, Alaska | M7.9 | 81 km | 33 km |
| Jun 10, 1996 | 46 km SSW of Adak, Alaska | M7.3 | 51 km | 26 km |
| Aug 30, 2013 | 101 km SW of Atka, Alaska | M7.0 | 103 km | 29 km |
| Mar 20, 1999 | 78 km WSW of Adak, Alaska | M6.9 | 82 km | 33 km |
| May 2, 2008 | 61 km W of Adak, Alaska | M6.6 | 64 km | 14 km |
| Sep 30, 1992 | 117 km SW of Adak, Alaska | M6.6 | 122 km | 33 km |
| Sep 3, 2010 | 70 km SE of Adak, Alaska | M6.5 | 72 km | 24 km |
| Jun 8, 1996 | 111 km WSW of Adak, Alaska | M6.5 | 115 km | 33 km |
| Sep 4, 2013 | 81 km SSW of Atka, Alaska | M6.5 | 132 km | 20 km |
| Mar 12, 1990 | 97 km SW of Atka, Alaska | M6.4 | 118 km | 14 km |
| Oct 15, 1997 | 99 km WSW of Adak, Alaska | M6.4 | 103 km | 22 km |
| Sep 26, 2012 | 118 km WSW of Adak, Alaska | M6.4 | 122 km | 16 km |
| Oct 8, 2010 | 104 km ESE of Adak, Alaska | M6.4 | 104 km | 19 km |
| Apr 5, 1994 | 123 km WSW of Adak, Alaska | M6.2 | 127 km | 20 km |
| May 8, 2017 | 135 km W of Adak, Alaska | M6.2 | 138 km | 13 km |
| Mar 22, 2008 | 146 km WNW of Adak, Alaska | M6.2 | 148 km | 132 km |
| Jan 23, 2020 | 84 km W of Adak, Alaska | M6.2 | 87 km | 10 km |
| Mar 21, 2025 | 88 km SSE of Adak, Alaska | M6.2 | 92 km | 17 km |
| Sep 30, 1992 | 134 km SW of Adak, Alaska | M6.1 | 138 km | 14 km |
| Oct 1, 1992 | 126 km SW of Adak, Alaska | M6.1 | 131 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 32.0 m (105 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1957 | ANDREANOF ISLANDS, AK | Earthquake | 32.0 m | 2 | 81 km |
| 1986 | ANDREANOF ISLANDS, AK | Earthquake | 0.9 m | — | 133 km |
| 1996 | ANDREANOF ISLANDS, AK | Earthquake | 0.5 m | — | 81 km |
| 2008 | KASATOCHI VOLCANO, ALEUTIAN IS, AK | Astronomical | 0.2 m | — | 81 km |
| 1996 | ANDREANOF ISLANDS, AK | Earthquake | 0.2 m | — | 51 km |
| 1971 | ANDREANOF ISLANDS, AK | Earthquake | 0.0 m | — | 86 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Moffett (11 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Moffett | Stratovolcano | 1,196 m (3,924 ft) | -1600 | 11 km |
| Kanaga | Stratovolcano | 1,307 m (4,288 ft) | 2012 | 39 km |
| Tanaga | Stratovolcano(es) | 1,806 m (5,925 ft) | 1914 | 106 km |
| Korovin | Stratovolcano(es) | 1,518 m (4,980 ft) | 2007 | 174 km |
| Atka | Stratovolcano(es) | 1,448 m (4,751 ft) | 1812 | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 3.8 in | Coldest |
| February | 33°F (0°C) | 3.8 in | |
| March | 33°F (1°C) | 3.5 in | |
| April | 36°F (2°C) | 3.2 in | |
| May | 39°F (4°C) | 3.0 in | |
| June | 43°F (6°C) | 2.1 in | Driest |
| July | 48°F (9°C) | 2.2 in | |
| August | 50°F (10°C) | 3.2 in | Warmest |
| September | 48°F (9°C) | 3.9 in | |
| October | 42°F (6°C) | 5.7 in | Wettest |
| November | 38°F (3°C) | 5.4 in | |
| December | 34°F (1°C) | 4.6 in |
Adak has a seasonal temperature swing of 18°F / from 32°F in January to 50°F in August. Total annual precipitation is 44.5 inches, with October being the wettest month (5.7") and June the driest (2.1").