MacKinnon Apartments · Photo: NoeHill · CC BY-SA 3.0Juneau gets about 88 inches of snow a winter, more than 96% of U.S. towns
The warmest part of a July day comes in at 63° on average. The wettest month is September; the driest is April. In July, afternoons here are cooler than in almost every U.S. town. Central heating does most of its work from October to April, in months below 50° on average.
A year in Juneau at a glance
Each month’s typical high and low, and what it brings.
What stands out about Juneau’s climate
Compared with towns across the U.S., with Juneau’s place in Alaska beside it.
What a year in Juneau feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 164 frost-free days a year
In half of years the last 32° night comes by May 3 and the first by October 14. Day counts come from NOAA’s station at Eaglecrest Base, AK, 14 miles from the town’s center, 470 ft higher; frost dates and degree days from Annex Creek, AK, 5 miles away.
The 2023 USDA map puts Juneau’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 88 inches of snow a winter
Snow, measured at Juneau International Airport, falls mostly in January. Precipitation (rain plus melted snow) adds up to 90 inches a year; September is the wettest month and April the driest. Rain or snow falls on about 230 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Juneau
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Annex Creek, AK.
Living with Juneau’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
164 frost-free days in zone 6a. The last frost comes by May 3 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 14.
Months with highs of 62–84° and lows of 40° or more: June, July and August. 198 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Juneau from natural hazards, avalanches are the largest share (52%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Juneau and similar climates
TownRatings has no climate map of the towns around Juneau yet.
Climates most like Juneau’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Juneau, AK | 27° | 63° | 90" | 88" |
| Hoquiam, WA | 37° | 68° | 81" | 0.5" |
| Lincoln City, OR | 40° | 67° | 88" | 0.1" |
| Crescent City, CA | 42° | 64° | 69" | 0.0" |
| North Elba, NY | 4° | 72° | 52" | 104" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
How Juneau compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Juneau’s place among Alaska’s.
Juneau weather by month
Highs, lows and precipitation from the nearest NOAA station; snow, wet days and snow on the ground from Juneau International Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground |
|---|---|---|---|---|---|---|
| January | 34° | 27° | 5.9" | 24.5" | 20 | 18 |
| February | 37° | 28° | 5.2" | 16.7" | 17 | 15 |
| March | 39° | 30° | 6.2" | 12.4" | 18 | 13 |
| April | 49° | 36° | 4.8" | 1.2" | 17 | 1 |
| May | 57° | 43° | 5.1" | 0.0" | 16 | 0 |
| June | 62° | 49° | 4.9" | 0.0" | 17 | 0 |
| July | 63° | 52° | 6.2" | 0.0" | 19 | 0 |
| August | 62° | 51° | 7.8" | 0.0" | 19 | 0 |
| September | 56° | 46° | 12.7" | 0.0" | 22 | 0 |
| October | 48° | 39° | 12.3" | 0.9" | 23 | 0 |
| November | 40° | 32° | 8.8" | 13.8" | 21 | 7 |
| December | 36° | 29° | 9.9" | 18.1" | 21 | 14 |
| Year | 49° | 38° | 89.6" | 87.6" | 230 | 68 |
Where Juneau’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s 1991–2020 normals at the nearest station (NOAA’s grid doesn’t cover Alaska).
- Snow: Juneau International Airport.
- Frost dates, heating and cooling: Annex Creek, AK, 5 miles away.
- Freezing nights, 90° and 100° days: Eaglecrest Base, AK, 14 miles from the town’s center, 470 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Juneau’s climate
What is the weather like in Juneau?
A typical July afternoon reaches 63°, a January night drops to 27°, and about 88 inches of snow falls in a normal winter. Milder January nights than 67% of U.S. towns; cooler July afternoons than all but 9 U.S. towns.
How cold does it get in Juneau in winter?
January nights average 27°. About 178 nights a year reach 32° or below and 4 reach 0° or below.
How much snow does Juneau get?
About 88 inches in a normal winter at Juneau International Airport, most of it in January, with snow on the ground about 68 days a year.
How hot does it get in Juneau?
July, with a typical high of 63°. 90° days are rare: none in a normal year at Annex Creek, AK.
When is the first and last frost in Juneau?
In half of years the last spring frost (32°) comes by May 3 and the first fall frost by October 14, about 164 frost-free days, at Annex Creek, AK.
What growing zone is Juneau in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Juneau?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Neighbors talk weather
Gardens, snow, and the best days of the year in Juneau.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.