Tonsina, AK
Full City Profile · Alaska · Chugach Census Area County
3.8
/5.0
B+
Good
41
Population
0/sq mi density
28°F
Avg Temperature
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Education
3.8 / 5.0
34.5% bachelor's degree or higher
Tonsina has a cool climate with an average annual temperature of 28°F (-2°C). Winters average -2°F in January while summers reach 57°F in July. Annual precipitation totals 13.2 inches. The area receives 71.8 inches of snow annually.
Temperature
-2°F Jan (-19°C)
57°F Jul (14°C)
| Annual Average | 27.6°F |
| 49% below US avg | |
| January Average | -2°F (-19°C) |
| July Average | 57°F (14°C) |
Geography
| Elevation | 3,664 ft (1,117 m) |
| Area | 159.0 sq mi (411.8 km²) |
| Population Density | 0/sq mi |
| Coordinates | 61.5303°N, 145.1101°W |
| Timezone | America/Anchorage |
| County | Chugach Census Area County |
| Nearest Airport | Ted Stevens Anchorage International (ANC) 164 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 19.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 24.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | No Rating |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Coastal Flood | Very Low |
| Tsunami | Very Low |
| Volcano | No Rating |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 51.8 m (170 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1964 | PRINCE WILLIAM SOUND, AK | Eruption + Earthquake | 51.8 m | 139 | 138 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Wrangell (78 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Wrangell | Shield | 4,278 m (14,035 ft) | 1912 | 78 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | -2°F (-19°C) | 1.1 in | Coldest |
| February | 6°F (-14°C) | 1.0 in | |
| March | 14°F (-10°C) | 0.5 in | |
| April | 32°F (-0°C) | 0.2 in | Driest |
| May | 44°F (7°C) | 0.5 in | |
| June | 53°F (12°C) | 1.4 in | |
| July | 57°F (14°C) | 1.8 in | Warmest, Wettest |
| August | 52°F (11°C) | 1.8 in | |
| September | 42°F (6°C) | 1.5 in | |
| October | 27°F (-3°C) | 1.0 in | |
| November | 7°F (-14°C) | 1.3 in | |
| December | -1°F (-18°C) | 1.3 in |
Tonsina has a seasonal temperature swing of 59°F / from -2°F in January to 57°F in July. Total annual precipitation is 13.3 inches, with July being the wettest month (1.8") and April the driest (0.2").