The best times to visit Downtown Juneau for ideal weather are
June 25th to September 2nd
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Downtown Juneau Travel Guide
Other Downtown Juneau Travel Info
Weather in Downtown Juneau
Temperature
Average temperatures in Downtown Juneau vary greatly. Considering humidity, temperatures feel cold for most of the year with a chance of rain or snow throughout most of the year. The area is far less temperate than some — in the 10th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Downtown Juneau, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 67.9°F (19.9°C) with temperatures rarely dropping below 49.8°F (9.9°C) at night.
Downtown Juneau Temperatures (Fahrenheit)
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Downtown Juneau Temperatures (Celsius)
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“Feels-Like” Temperatures
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Downtown Juneau Perceived Temperature (F)
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Downtown Juneau Perceived Temperature (C)
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Average Downtown Juneau Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
Show Fahrenheit
| Month | Avg. High (°F) | Avg. Mean (°F) | Avg. Low (°F) |
|---|---|---|---|
| Jan | 35.4 | 30.3 | 25.1 |
| Feb | 36 | 29.8 | 23.5 |
| Mar | 39.2 | 32.3 | 25.2 |
| Apr | 48.8 | 39.8 | 31.3 |
| May | 59.4 | 49.2 | 39.1 |
| Jun | 63.8 | 54.3 | 45.8 |
| Jul | 64.9 | 56.2 | 49.2 |
| Aug | 63.9 | 55.7 | 48.9 |
| Sep | 57.2 | 50.1 | 44 |
| Oct | 48.5 | 42.7 | 37.2 |
| Nov | 39 | 33.8 | 28.4 |
| Dec | 33.8 | 28.2 | 22.2 |
Show Celsius
| Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
|---|---|---|---|
| Jan | 1.9 | -0.9 | -3.8 |
| Feb | 2.2 | -1.2 | -4.7 |
| Mar | 4 | 0.2 | -3.8 |
| Apr | 9.3 | 4.3 | -0.4 |
| May | 15.2 | 9.6 | 3.9 |
| Jun | 17.7 | 12.4 | 7.7 |
| Jul | 18.3 | 13.4 | 9.6 |
| Aug | 17.7 | 13.2 | 9.4 |
| Sep | 14 | 10.1 | 6.7 |
| Oct | 9.2 | 5.9 | 2.9 |
| Nov | 3.9 | 1 | -2 |
| Dec | 1 | -2.1 | -5.4 |
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Downtown Juneau are May, June, and then March. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid October with an average of 5 days of significant precipitation the week of October 15th.
When can you find snow in Downtown Juneau? Weather stations report large amounts of snow likely to be deepest around March, especially close to early to mid March. The best time to ski (if at all) in Downtown Juneau is often around around December 3rd when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Downtown Juneau.
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Snow on the Ground
The graph below shows the average snow on the ground in Downtown Juneau (in).
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Average Rain and Snow by Month
Show Inches
| Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
|---|---|---|---|
| Jan | 52% | 5.5 | 8 |
| Feb | 38% | 5.3 | 3.8 |
| Mar | 35% | 6.6 | 3.7 |
| Apr | 38% | 3 | 3.7 |
| May | 26% | 0 | 3 |
| Jun | 29% | 0 | 4 |
| Jul | 40% | 0 | 6 |
| Aug | 46% | 0 | 6.5 |
| Sep | 58% | 0 | 9.3 |
| Oct | 54% | 1.5 | 8.5 |
| Nov | 49% | 4.6 | 6.5 |
| Dec | 40% | 4 | 4.7 |
Show Centimeters
| Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
|---|---|---|---|
| Jan | 52 | 14 | 20.3 |
| Feb | 38 | 13.5 | 9.7 |
| Mar | 35 | 16.8 | 9.4 |
| Apr | 38 | 7.6 | 9.4 |
| May | 26 | 0 | 7.6 |
| Jun | 29 | 0 | 10.2 |
| Jul | 40 | 0 | 15.2 |
| Aug | 46 | 0 | 16.5 |
| Sep | 58 | 0 | 23.6 |
| Oct | 54 | 3.8 | 21.6 |
| Nov | 49 | 11.7 | 16.5 |
| Dec | 40 | 10.2 | 11.9 |
Humidity and Wind
Downtown Juneau has some extremely humid months, and above average humidity throughout the year. The least humid month is May (63.5% relative humidity), and the most humid month is September (83.4%).
Wind in Downtown Juneau is usually calm. The windiest month is October, followed by March and January. October’s average wind speed of around 6.8 knots (7.8 MPH or 12.6 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early March where average top sustained speeds reach 16.6 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Downtown Juneau.
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Wind
The graph below shows wind speed (max and average) in knots.
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Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
| Month | Avg. Wind | Avg. Wind Feel | Sustained High Wind | High Wind Feel |
| Jan | 6.5 | Light breeze | 14.1 | Significant breeze |
| Feb | 6 | Light breeze | 13.8 | Significant breeze |
| Mar | 6.5 | Light breeze | 14.8 | Significant breeze |
| Apr | 6.3 | Light breeze | 14.5 | Significant breeze |
| May | 5.8 | Light breeze | 12.8 | Significant breeze |
| Jun | 5.4 | Light breeze | 12 | Significant breeze |
| Jul | 5.1 | Light breeze | 10.9 | Significant breeze |
| Aug | 5.2 | Light breeze | 11.3 | Significant breeze |
| Sep | 6.5 | Light breeze | 13.9 | Significant breeze |
| Oct | 6.8 | Light breeze | 14.9 | Significant breeze |
| Nov | 6.2 | Light breeze | 14.2 | Significant breeze |
| Dec | 5.3 | Light breeze | 12.5 | Significant breeze |
Show Relative Humidity by Month
| Month | Avg. Relative Humidity |
|---|---|
| Jan | 79.4% |
| Feb | 76.1% |
| Mar | 68.6% |
| Apr | 67.6% |
| May | 63.5% |
| Jun | 68% |
| Jul | 76.6% |
| Aug | 80.2% |
| Sep | 83.4% |
| Oct | 82.3% |
| Nov | 81.9% |
| Dec | 81.4% |
Is it Safe to Travel to Downtown Juneau?
Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Downtown Juneau, AK, US is June, followed by July and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Downtown Juneau in December. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
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Overall Downtown Juneau Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 64.5°F (18.1°C) and 35.2°F (1.8°C) with warmer temperatures in the later months. Rain is very common with 8 to 11 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.
Summer (June through August)
The middle-year months have comfortably cool weather with high temperatures that are brisk. These months see moderate precipitation with 9 to 14 days of precipitation per month. June – August is the busiest season for tourism in Downtown Juneau, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 59.7°F (15.4°C) and 35.9°F (2.2°C), which will feel chilly given the humidity and wind. It rains or snows a great amount: 15 to 17 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is far too cold this time of year in Downtown Juneau to be enjoyable for warm weather travelers. The average high during this season is between 37.5°F (3.1°C) and 32.1°F (0.1°C). On average, it rains or snows a very great amount: 11 to 16 times per month. These times of year are fairly slow with tourists.
Best Times to Travel› the United States › Downtown Juneau, AK, US