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Weather & Climate in Old Harbor, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Old Harbor has a cool climate with an average annual temperature of 41°F (5°C). Winters average 30°F in January while summers reach 54°F in July. The area gets 200 sunny days per year. 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 1,759 feet.
Temperature
30°F Jan (-1°C)
54°F Jul (12°C)
| Annual Average | 40.5°F |
| 25% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 54°F (12°C) |
| Sunny Days | 200 days/yr |
Geography
| Elevation | 1,759 ft (536 m) |
| Area | 26.5 sq mi (68.7 km²) |
| Population Density | 11/sq mi |
| Coordinates | 57.2188°N, 153.3297°W |
| Timezone | America/Anchorage |
| County | Kodiak Island Borough County |
| Nearest Airport | Ted Stevens Anchorage International (ANC) 298 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 21.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 65.1 / 100 |
| Social Vulnerability | 33.2 / 100 |
| Community Resilience | 18.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | No Rating |
| Strong Wind | No Rating |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Tsunami | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2,583 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Dec 6, 1999 | 26 km SSE of Karluk, Alaska | M7.0 | 63 km | 44 km |
| Jan 10, 2001 | 47 km S of Old Harbor, Alaska | M6.9 | 50 km | 36 km |
| Jul 11, 2000 | 24 km SSW of Larsen Bay, Alaska | M6.5 | 54 km | 43 km |
| Dec 7, 1999 | 29 km N of Akhiok, Alaska | M6.4 | 56 km | 44 km |
| May 7, 1999 | 129 km SSE of Old Harbor, Alaska | M6.2 | 131 km | 10 km |
| May 25, 2008 | 122 km SSE of Akhiok, Alaska | M6.0 | 146 km | 20 km |
| Mar 30, 2009 | 124 km SSE of Old Harbor, Alaska | M5.9 | 127 km | 13 km |
| May 16, 2009 | 136 km SE of Old Harbor, Alaska | M5.9 | 138 km | 10 km |
| Apr 9, 2005 | 107 km S of Akhiok, Alaska | M5.8 | 149 km | 10 km |
| Nov 6, 2000 | 113 km SSE of Akhiok, Alaska | M5.8 | 128 km | 21 km |
| Nov 8, 1998 | 101 km SE of Old Harbor, Alaska | M5.7 | 103 km | 10 km |
| Mar 8, 1990 | 35 km N of Aleneva, Alaska | M5.6 | 131 km | 73 km |
| Aug 3, 2003 | 105 km SSE of Akhiok, Alaska | M5.6 | 123 km | 17 km |
| Aug 31, 2017 | 61 km NW of Aleneva, Alaska | M5.6 | 138 km | 63 km |
| Dec 8, 1996 | 129 km SE of Old Harbor, Alaska | M5.5 | 131 km | 10 km |
| Jul 11, 2000 | 23 km SSE of Karluk, Alaska | M5.5 | 59 km | 38 km |
| Aug 26, 1999 | 68 km NNW of Karluk, Alaska | M5.5 | 137 km | 91 km |
| May 11, 2017 | 69 km SE of Old Harbor, Alaska | M5.4 | 72 km | 10 km |
| Mar 3, 1996 | 117 km SSE of Old Harbor, Alaska | M5.4 | 120 km | 10 km |
| Dec 7, 2013 | 59 km WSW of Akhiok, Alaska | M5.4 | 118 km | 55 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 30.0 m (98 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1788 | ALASKA PENINSULA, AK | Earthquake | 30.0 m | — | 31 km |
| 1854 | KODIAK ISLAND, AK | Eruption + Earthquake | 2.4 m | — | 84 km |
| 1970 | ANDREANOF ISLANDS, AK | Earthquake | 0.0 m | — | 46 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Katmai (153 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Katmai | Stratovolcano | 2,047 m (6,716 ft) | 1912 | 153 km |
| Trident | Stratovolcano | 1,864 m (6,115 ft) | 1974 | 154 km |
| Martin | Stratovolcano | 1,863 m (6,112 ft) | 1953 | 161 km |
| Ugashik-Peulik | Stratovolcano | 1,474 m (4,836 ft) | 1814 | 191 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: TWIN CREEKS (3,418 acres, 2015).
| Year | Name | Acres Burned | Distance |
| 2015 | TWIN CREEKS | 3,418 | 74 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 6.2 in | |
| February | 31°F (-1°C) | 4.7 in | |
| March | 29°F (-2°C) | 4.3 in | Coldest |
| April | 34°F (1°C) | 4.6 in | |
| May | 40°F (5°C) | 5.2 in | |
| June | 46°F (8°C) | 4.6 in | |
| July | 54°F (12°C) | 3.6 in | Warmest, Driest |
| August | 53°F (12°C) | 4.3 in | |
| September | 48°F (9°C) | 6.6 in | |
| October | 40°F (5°C) | 7.0 in | Wettest |
| November | 35°F (2°C) | 5.6 in | |
| December | 30°F (-1°C) | 6.0 in |
Old Harbor has a seasonal temperature swing of 25°F / from 29°F in March to 54°F in July. Total annual precipitation is 62.7 inches, with October being the wettest month (7.0") and July the driest (3.6").