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Weather & Climate in Port Alexander, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Alexander experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 36°F in January while summers reach 57°F in July. The area gets 166 sunny days per year, below the national average of 205. Annual precipitation totals 162.0 inches (wetter than the 38-inch national average). The area receives 56.0 inches of snow annually, making winter weather a significant factor for residents. 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 79 feet.
Temperature
36°F Jan (2°C)
57°F Jul (14°C)
| Annual Average | 45.7°F |
| 15% below US avg | |
| January Average | 36°F (2°C) |
| July Average | 57°F (14°C) |
| Sunny Days | 166 days/yr |
Geography
| Elevation | 79 ft (24 m) |
| Area | 3.5 sq mi (9.1 km²) |
| Population Density | 7/sq mi |
| Coordinates | 56.2376°N, 134.6528°W |
| Timezone | America/Anchorage |
| County | Prince of Wales-Hyder Census Area County |
| Nearest Airport | Ketchikan International (KTN) 130 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 21.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 1.0 / 100 |
| Social Vulnerability | 92.8 / 100 |
| Community Resilience | 44.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| 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 | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Tsunami | Very Low |
| Volcano | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
376 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 5, 2013 | 110 km SW of Edna Bay, Alaska | M7.5 | 113 km | 9 km |
| Jun 28, 2004 | 98 km WSW of Craig, Alaska | M6.8 | 130 km | 20 km |
| Jan 12, 2024 | 69 km WNW of Port Alexander, Alaska | M5.9 | 69 km | 11 km |
| Jan 31, 2013 | 92 km SSW of Port Alexander, Alaska | M5.9 | 91 km | 14 km |
| Jul 12, 2003 | 47 km SSW of Port Alexander, Alaska | M5.9 | 46 km | 10 km |
| Jan 14, 2013 | 116 km WSW of Craig, Alaska | M5.5 | 132 km | 14 km |
| Jan 5, 2013 | 107 km WSW of Craig, Alaska | M5.2 | 129 km | 10 km |
| Jul 4, 2004 | 110 km SW of Craig, Alaska | M4.9 | 146 km | 13 km |
| Jan 8, 2013 | 98 km SSW of Port Alexander, Alaska | M4.9 | 97 km | 20 km |
| Mar 9, 2019 | Southeastern Alaska | M4.8 | 108 km | 28 km |
| Jan 5, 2013 | off the coast of Southeastern Alaska | M4.7 | 61 km | 10 km |
| Jan 5, 2013 | 91 km SW of Port Alexander, Alaska | M4.7 | 90 km | 12 km |
| Jan 5, 2013 | 79 km SSW of Port Alexander, Alaska | M4.7 | 78 km | 20 km |
| Jan 9, 2013 | Southeastern Alaska | M4.7 | 101 km | 10 km |
| Dec 16, 1998 | 39 km SW of Sitka, Alaska | M4.6 | 88 km | 12 km |
| Dec 16, 1998 | 110 km SSW of Port Alexander, Alaska | M4.6 | 109 km | 10 km |
| Jan 6, 2013 | 67 km SSW of Port Alexander, Alaska | M4.5 | 66 km | 20 km |
| Jul 9, 2001 | 27 km W of Port Alexander, Alaska | M4.5 | 27 km | 25 km |
| Jan 5, 2013 | 115 km WSW of Craig, Alaska | M4.5 | 125 km | 1 km |
| May 27, 2013 | 84 km SSW of Port Alexander, Alaska | M4.4 | 83 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 1.8 m (6 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1880 | SITKA, AK | Eruption + Earthquake | 1.8 m | — | 118 km |
| 2013 | SE. ALASKA, AK | Eruption + Earthquake | 1.5 m | — | 94 km |
| 1972 | SE. ALASKA, AK | Eruption + Earthquake | 0.1 m | — | 91 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Edgecumbe (113 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Edgecumbe | Stratovolcano(es) | 970 m (3,182 ft) | -2220 | 113 km |
| Tlevak Strait-Suemez Is. | Volcanic field | 50 m (164 ft) | Unknown | 139 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 36°F (2°C) | 21.5 in | |
| February | 35°F (2°C) | 17.7 in | |
| March | 37°F (3°C) | 15.9 in | |
| April | 40°F (5°C) | 13.4 in | |
| May | 46°F (8°C) | 11.4 in | |
| June | 51°F (10°C) | 8.3 in | |
| July | 57°F (14°C) | 7.9 in | Warmest, Driest |
| August | 55°F (13°C) | 11.7 in | |
| September | 51°F (11°C) | 22.0 in | |
| October | 45°F (7°C) | 33.0 in | Wettest |
| November | 38°F (3°C) | 24.9 in | |
| December | 35°F (2°C) | 23.2 in | Coldest |
Port Alexander has a seasonal temperature swing of 22°F / from 35°F in December to 57°F in July. Total annual precipitation is 210.8 inches, with October being the wettest month (33.0") and July the driest (7.9").