Climate Comfort Score
24/100
Below Average
NOAA 1991–2020 normals 42°F annual avg Public-domain federal data
Juneau, AK Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 42°F
- Avg annual temp
- 24/100
- Comfort score
- 67.0"
- Annual precip
- 152d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Juneau
Juneau, Alaska averages 42°F a year and scores 24/100 on the comfort index - below average, milder than 0% of U.S. cities.
- 42°F
- yearly average temperature, NOAA normal
- 24/100
- comfort score, milder than 0% of U.S. cities
- 67.0"
- annual precipitation · 88" snow
- 152 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
42°F (6°C)
Avg High
48°F
Avg Low
36°F
Annual Precip
67.0"
Annual Snow
87.6"
Comfort Score
24/100
Below Average
Avg Annual Temperature
42°F
30-year mean (NOAA NCEI)
Annual Precipitation
67.0"
Plus 87.6" of snow
Comfort score vs national 100-point ceiling (Juneau) 24.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Juneau area.
How Juneau compares to every U.S. city
Juneau's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
24 Top 100% higher than 0% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Juneau
MethodologyJuneau's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 33°F (1°C) | 24°F (-5°C) | 29°F (-2°C) | 6.0" | 24.5" | 22.7 | 0.0 |
| February | 36°F (2°C) | 25°F (-4°C) | 30°F (-1°C) | 4.3" | 16.7" | 20.7 | 0.0 |
| March | 39°F (4°C) | 27°F (-3°C) | 33°F (0°C) | 3.7" | 12.4" | 22.1 | 0.0 |
| April | 49°F (9°C) | 33°F (0°C) | 41°F (5°C) | 3.5" | 1.2" | 13.0 | 0.0 |
| May | 58°F (14°C) | 40°F (5°C) | 49°F (9°C) | 3.5" | 0.0" | 2.1 | 0.0 |
| June | 62°F (17°C) | 47°F (8°C) | 55°F (13°C) | 3.8" | 0.0" | 0.0 | 0.0 |
| July | 64°F (18°C) | 50°F (10°C) | 57°F (14°C) | 5.1" | 0.0" | 0.0 | 0.0 |
| August | 63°F (17°C) | 49°F (10°C) | 56°F (13°C) | 6.4" | 0.0" | 0.0 | 0.0 |
| September | 56°F (13°C) | 44°F (7°C) | 50°F (10°C) | 9.2" | 0.0" | 1.1 | 0.0 |
| October | 47°F (8°C) | 37°F (3°C) | 42°F (6°C) | 8.4" | 0.9" | 7.9 | 0.0 |
| November | 38°F (3°C) | 29°F (-2°C) | 34°F (1°C) | 6.5" | 13.8" | 17.0 | 0.0 |
| December | 35°F (2°C) | 26°F (-3°C) | 30°F (-1°C) | 6.5" | 18.1" | 21.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 6.0"
Snow: 24.5"
20.4 days with precipitation
February 4.3"
Snow: 16.7"
16.8 days with precipitation
March 3.7"
Snow: 12.4"
17.8 days with precipitation
April 3.5"
Snow: 1.2"
17.2 days with precipitation
May 3.5"
16.1 days with precipitation
June 3.8"
16.7 days with precipitation
July 5.1"
18.5 days with precipitation
August 6.4"
19.4 days with precipitation
September 9.2"
22.3 days with precipitation
October 8.4"
Snow: 0.9"
23.0 days with precipitation
November 6.5"
Snow: 13.8"
20.9 days with precipitation
December 6.5"
Snow: 18.1"
21.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 3
50% probability date
Last Spring Freeze
May 4
50% probability date
Growing Season
152 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,335
Higher = more heating needed
Cooling Degree Days
3
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 84% | 7.4 | 10% | 70% |
| February | 76% | 7.4 | 20% | 52% |
| March | 76% | 7.4 | 13% | 57% |
| April | 72% | 8.2 | 14% | 55% |
| May | 74% | 7.2 | 6% | 57% |
| June | 77% | 6.7 | 5% | 62% |
| July | 82% | 6.4 | 5% | 65% |
| August | 87% | 7.1 | 4% | 70% |
| September | 89% | 7.6 | 4% | 73% |
| October | 87% | 7.2 | 7% | 73% |
| November | 85% | 8.0 | 7% | 71% |
| December | 84% | 7.3 | 11% | 69% |
What Juneau's climate means for you
Juneau runs 42°F a year - peaking in July, coldest in January.
- Gardeners get about 152 frost-free days, with the last spring freeze near May 4 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,335 heating and 3 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Juneau, AK
Based on station USW00025309 feeding NOAA's 1991–2020 climate normals, Juneau, Alaska averages 42°F a year, ranging from a mean daily high of 48°F to a mean daily low of 36°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Beyond temperature, Juneau averages 67.0 inches of precipitation annually, with 87.6 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 152 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 4 and the first fall freeze near October 3. Turning to energy use, 8,335 heating degree days and 3 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Juneau scores 24/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Juneau, AK? ▼
The average annual temperature in Juneau, Alaska is 42°F. The warmest month averages 64°F (18°C) and the coldest averages 24°F (-5°C).
How much rain does Juneau get? ▼
Juneau receives 67.0 inches of precipitation annually, including 87.6 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Juneau? ▼
Juneau has a climate comfort score of 24/100 (Below Average), milder than 0% of U.S. cities in the PlainClimate database.
When is the growing season in Juneau? ▼
Juneau has approximately 152 frost-free days per year, with the last spring freeze around May 4 and the first fall freeze around October 3.
How much energy does heating and cooling require in Juneau? ▼
Juneau has 8,335 heating degree days and 3 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Juneau climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00025309 near Juneau.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00025309. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.