All Countries
Weather & Climate in Juneau, AK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Juneau has a cool climate with an average annual temperature of 39°F (4°C). Winters average 24°F in January while summers reach 53°F in July. The area gets 200 sunny days per year. Air quality is rated Good with a median AQI of 24 / among the cleanest air in the country. 85% of days have good air quality. The city sits at an elevation of 686 feet.
Temperature
24°F Jan (-4°C)
53°F Jul (11°C)
| Annual Average | 39.4°F |
| 27% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 53°F (11°C) |
| Sunny Days | 200 days/yr |
Geography
| Elevation | 686 ft (209 m) |
| Area | 3,253.9 sq mi (8,427.7 km²) |
| Population Density | 12/sq mi |
| Coordinates | 58.3729°N, 134.1784°W |
| Timezone | America/Anchorage |
| County | Juneau City and Borough County |
| Nearest Airport | Juneau International (JNU) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 24.0 |
| Rating | Good |
| Good Days % | 85.4% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 11.5 / 100 |
| Social Vulnerability | 21.1 / 100 |
| Community Resilience | 62.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | No Rating |
| Strong Wind | No Rating |
| Winter Weather | Relatively High |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | Very Low |
| Tsunami | Very Low |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
193 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Feb 24, 1997 | 45 km NNW of Gustavus, Alaska | M4.5 | 121 km | 5 km |
| Jul 8, 2021 | 30 km SSW of Covenant Life, Alaska | M4.4 | 148 km | 7 km |
| Aug 13, 1991 | 67 km NW of Gustavus, Alaska | M4.0 | 148 km | -2 km |
| Jul 31, 1991 | 25 km SSE of Mud Bay, Alaska | M4.0 | 88 km | 0 km |
| Mar 5, 2007 | 54 km N of Juneau, Alaska | M4.0 | 48 km | 0 km |
| Aug 18, 2017 | 50 km SSW of Covenant Life, Alaska | M4.0 | 146 km | 12 km |
| Jan 8, 2011 | 14 km SE of Skagway, Alaska | M4.0 | 123 km | 4 km |
| Nov 13, 1992 | 27 km SSW of Covenant Life, Alaska | M3.7 | 150 km | 10 km |
| Jul 8, 2008 | 63 km NW of Gustavus, Alaska | M3.7 | 140 km | 13 km |
| Jun 7, 2003 | 50 km E of Juneau, Alaska | M3.6 | 37 km | 7 km |
| Nov 6, 1992 | 34 km S of Mud Bay, Alaska | M3.6 | 90 km | 10 km |
| Oct 4, 1998 | 25 km SSW of Covenant Life, Alaska | M3.6 | 149 km | 2 km |
| May 25, 2009 | 44 km SE of Mud Bay, Alaska | M3.6 | 68 km | 6 km |
| Jun 16, 1992 | 57 km E of Juneau, Alaska | M3.6 | 44 km | 5 km |
| Nov 9, 2009 | 57 km ENE of Hobart Bay, Alaska | M3.5 | 124 km | 1 km |
| Jun 17, 1997 | 52 km SSW of Covenant Life, Alaska | M3.5 | 136 km | -3 km |
| Jul 8, 2021 | 30 km SSW of Covenant Life, Alaska | M3.5 | 148 km | 5 km |
| Mar 11, 2013 | 64 km NW of Gustavus, Alaska | M3.5 | 148 km | 1 km |
| Jun 7, 2003 | 50 km E of Juneau, Alaska | M3.4 | 37 km | 13 km |
| Mar 1, 2021 | 35 km SSW of Klukwan, Alaska | M3.4 | 133 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 524.6 m (1,721 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1958 | SE. ALASKA, AK | Eruption + Earthquake | 524.6 m | 5 | 145 km |
| 2025 | TRACY ARM, AK | Meteorological | 470.0 m | — | 89 km |
| 1994 | SKAGWAY, AK | Meteorological | 9.0 m | 1 | 141 km |
| 1917 | TAKU INLET, JUNEAU, AK | Meteorological | 2.4 m | 1 | 19 km |
| 1907 | SKAGWAY, AK | Eruption + Earthquake | 0.7 m | — | 147 km |
| 1927 | SE. ALASKA, AK | Eruption + Earthquake | — | — | 135 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Atlin Volcanic Field (153 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Atlin Volcanic Field | Pyroclastic cone(s) | 1,880 m (6,168 ft) | Unknown | 153 km |
| Level Mountain | Shield | 2,190 m (7,185 ft) | Unknown | 165 km |
| Edgecumbe | Stratovolcano(es) | 970 m (3,182 ft) | -2220 | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 6.7 in | |
| February | 21°F (-6°C) | 5.2 in | |
| March | 24°F (-5°C) | 4.8 in | |
| April | 32°F (-0°C) | 3.2 in | Driest |
| May | 39°F (4°C) | 3.2 in | |
| June | 45°F (7°C) | 3.8 in | |
| July | 53°F (11°C) | 4.3 in | Warmest |
| August | 48°F (9°C) | 5.8 in | |
| September | 43°F (6°C) | 8.3 in | |
| October | 35°F (2°C) | 9.8 in | Wettest |
| November | 25°F (-4°C) | 7.0 in | |
| December | 21°F (-6°C) | 6.8 in | Coldest |
Juneau has a seasonal temperature swing of 32°F / from 21°F in December to 53°F in July. Total annual precipitation is 68.9 inches, with October being the wettest month (9.8") and April the driest (3.2").