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Weather & Climate in Nanwalek, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Nanwalek has a cool climate with an average annual temperature of 40°F (4°C). Winters average 26°F in January while summers reach 55°F in July. The area gets 233 sunny days per year, above the national average. Annual precipitation totals 40.4 inches. 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 202 feet.
Temperature
26°F Jan (-3°C)
55°F Jul (13°C)
| Annual Average | 39.5°F |
| 27% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 55°F (13°C) |
| Sunny Days | 233 days/yr |
Geography
| Elevation | 202 ft (62 m) |
| Area | 8.4 sq mi (21.8 km²) |
| Population Density | 25/sq mi |
| Coordinates | 59.3338°N, 151.9296°W |
| Timezone | America/Anchorage |
| County | Kenai Peninsula Borough County |
| Nearest Airport | Ted Stevens Anchorage International (ANC) 143 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 21.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 93.0 / 100 |
| Social Vulnerability | 47.1 / 100 |
| Community Resilience | 6.5 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | No Rating |
| Winter Weather | Relatively High |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | Very Low |
| Tsunami | Relatively Moderate |
| Volcano | Relatively Low |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
9,685 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Jan 24, 2016 | 47 km ESE of Pedro Bay, Alaska | M7.1 | 86 km | 126 km |
| Jul 29, 2015 | 52 km ENE of Pedro Bay, Alaska | M6.4 | 95 km | 119 km |
| Jul 9, 1998 | 73 km WNW of Ninilchik, Alaska | M6.1 | 126 km | 131 km |
| Nov 20, 1993 | 66 km ENE of Pedro Bay, Alaska | M5.9 | 99 km | 121 km |
| Jan 24, 2009 | Southern Alaska | M5.9 | 55 km | 98 km |
| May 10, 2014 | 23 km WNW of Happy Valley, Alaska | M5.8 | 76 km | 89 km |
| May 19, 2000 | 63 km WSW of Nanwalek, Alaska | M5.8 | 62 km | 75 km |
| May 27, 2019 | 61 km SSW of Nanwalek, Alaska | M5.8 | 58 km | 64 km |
| May 5, 1999 | 30 km ESE of Port Graham, Alaska | M5.7 | 35 km | 73 km |
| Mar 2, 2017 | 48 km WNW of Nanwalek, Alaska | M5.6 | 49 km | 78 km |
| Aug 31, 2017 | 61 km NW of Aleneva, Alaska | M5.6 | 139 km | 63 km |
| Feb 12, 1995 | 67 km SE of Pedro Bay, Alaska | M5.6 | 69 km | 110 km |
| Mar 8, 1990 | 35 km N of Aleneva, Alaska | M5.6 | 122 km | 73 km |
| May 12, 1992 | 37 km ESE of Pedro Bay, Alaska | M5.5 | 95 km | 139 km |
| Feb 10, 2004 | 6 km WNW of Nanwalek, Alaska | M5.5 | 7 km | 66 km |
| Aug 13, 1990 | 13 km NW of Happy Valley, Alaska | M5.5 | 77 km | 72 km |
| Jan 25, 2001 | 39 km WNW of Ninilchik, Alaska | M5.5 | 92 km | 83 km |
| Jan 20, 2004 | 82 km ENE of Ouzinkie, Alaska | M5.5 | 130 km | 46 km |
| Mar 19, 2023 | 19 km SSW of Anchor Point, Alaska | M5.4 | 31 km | 65 km |
| May 19, 2005 | 54 km W of Happy Valley, Alaska | M5.4 | 87 km | 96 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 60.0 m (197 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1967 | GREWINGK, AK | Meteorological | 60.0 m | — | 56 km |
| 2024 | PEDERSEN LAGOON, AK | Meteorological | 17.0 m | — | 134 km |
| 1883 | COOK INLET, AK | Explosion | 9.1 m | 8 | 84 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Augustine (85 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Augustine | Lava dome(s) | 1,252 m (4,108 ft) | 2006 | 85 km |
| Iliamna | Stratovolcano | 3,053 m (10,016 ft) | 1876 | 101 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: CARIBOU HILLS (46,686 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | CARIBOU HILLS | 46,686 | 87 km |
| 2005 | TRACY AVE | 5,416 | 55 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 3.5 in | Coldest |
| February | 29°F (-2°C) | 2.7 in | |
| March | 31°F (-1°C) | 2.6 in | |
| April | 36°F (2°C) | 2.1 in | |
| May | 43°F (6°C) | 1.8 in | |
| June | 49°F (9°C) | 1.7 in | Driest |
| July | 55°F (13°C) | 2.0 in | Warmest |
| August | 54°F (12°C) | 3.0 in | |
| September | 48°F (9°C) | 4.2 in | Wettest |
| October | 39°F (4°C) | 3.9 in | |
| November | 33°F (0°C) | 3.5 in | |
| December | 30°F (-1°C) | 3.7 in |
Nanwalek has a seasonal temperature swing of 30°F / from 26°F in January to 55°F in July. Total annual precipitation is 34.5 inches, with September being the wettest month (4.2") and June the driest (1.7").