Juneau weather in December
In December, Juneau sees average daytime highs of 29°F and overnight lows near 21°F, with 10.8 in of precipitation across 21.1 wet days and about 6.2 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.
Highs ease over the month, from about 30°F in the first days to 27°F by the end. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels dry.
Daylight stretches from about 6 h 36 min at the start of December to 6 h 12 min by month's end. Set against the rest of the year, December is Juneau's 7th-clearest and 1st-windiest month. For the whole year in context, see Juneau's year-round climate.
- Daytime high
- 29°
- 11th warmest
- Overnight low
- 21°
- 3rd coldest
- Precipitation
- 10.8 in
- 21.1 wet days
- Daylight
- 6 h 06 min
- 8:51 AM – 2:57 PM
- Cloud cover
- 79%
- 7th clearest
- Wind
- 6 mph
- 1st windiest
- Solar energy
- 0.29 kWh/m²
- Travel score
- 0.0
- out of 10
Juneau is consolidated city-borough and capital of the U.S. state of Alaska.
- Density
- 4/km²
- people per km²
- Founded
- 1881
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 30°F in the first days to 27°F by the end.
A typical December day in Juneau reaches about 29°F in the afternoon and slips back to 21°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 12°F and 40°F. Set against its neighbours, December runs about 4°F cooler than November and about 2°F warmer than January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 26 |
| Avg low (°F) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 30 | 22 |
| 2 | 30 | 22 |
| 3 | 30 | 22 |
| 4 | 30 | 22 |
| 5 | 30 | 22 |
| 6 | 30 | 22 |
| 7 | 30 | 22 |
| 8 | 29 | 22 |
| 9 | 29 | 22 |
| 10 | 29 | 22 |
| 11 | 29 | 21 |
| 12 | 29 | 21 |
| 13 | 29 | 21 |
| 14 | 29 | 21 |
| 15 | 29 | 21 |
| 16 | 29 | 21 |
| 17 | 29 | 21 |
| 18 | 29 | 21 |
| 19 | 28 | 20 |
| 20 | 28 | 20 |
| 21 | 28 | 20 |
| 22 | 28 | 20 |
| 23 | 28 | 20 |
| 24 | 28 | 20 |
| 25 | 28 | 20 |
| 26 | 27 | 20 |
| 27 | 27 | 19 |
| 28 | 27 | 19 |
| 29 | 27 | 19 |
| 30 | 27 | 19 |
| 31 | 26 | 19 |
How December really feels in Juneau
Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in December is cold — wind chill drags the overnight "feels like" below the raw low.
Juneau weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 27° / 19° | 9.8 | 19.8 | 19.4 | 6.8 | 0.0 |
| Feb | 29° / 20° | 7.4 | 16.6 | 15.9 | 8.9 | 0.0 |
| Mar | 33° / 22° | 7.2 | 17.9 | 17.7 | 11.4 | 0.0 |
| Apr | 41° / 30° | 5.6 | 16.5 | 11.9 | 14 | 0.2 |
| May | 50° / 37° | 5.4 | 16 | 3.6 | 16.4 | 1.9 |
| Jun | 58° / 46° | 5.3 | 16.5 | 0 | 17.8 | 3.3 |
| Jul | 60° / 50° | 7.0 | 18.9 | 0 | 17.2 | 3.7 |
| Aug | 59° / 49° | 9.3 | 19.3 | 0 | 15.1 | 3.5 |
| Sep | 53° / 43° | 13.0 | 21 | 0.2 | 12.5 | 2.2 |
| Oct | 43° / 34° | 13.0 | 22.7 | 8.2 | 9.9 | 0.4 |
| Nov | 33° / 24° | 10.3 | 20.9 | 18.6 | 7.5 | 0.0 |
| Dec | 29° / 21° | 10.8 | 21.1 | 20.4 | 6.2 | 0.0 |
Cloud cover in December
The sky is clear or mostly clear about 14% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 5% of December, with mostly cloudy or overcast conditions the remaining 80%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 19 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 23 | 23 |
| Cloudier (%) | 82 | 82 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 82 | 81 | 80 | 80 | 80 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 77 | 77 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 18 | 82 |
| 2 | 18 | 82 |
| 3 | 17 | 83 |
| 4 | 17 | 83 |
| 5 | 17 | 83 |
| 6 | 17 | 83 |
| 7 | 17 | 83 |
| 8 | 17 | 83 |
| 9 | 17 | 83 |
| 10 | 17 | 83 |
| 11 | 17 | 83 |
| 12 | 17 | 83 |
| 13 | 17 | 83 |
| 14 | 18 | 82 |
| 15 | 19 | 81 |
| 16 | 20 | 80 |
| 17 | 20 | 80 |
| 18 | 20 | 80 |
| 19 | 21 | 79 |
| 20 | 21 | 79 |
| 21 | 21 | 79 |
| 22 | 21 | 79 |
| 23 | 21 | 79 |
| 24 | 21 | 79 |
| 25 | 21 | 79 |
| 26 | 22 | 78 |
| 27 | 22 | 78 |
| 28 | 22 | 78 |
| 29 | 22 | 78 |
| 30 | 23 | 77 |
| 31 | 23 | 77 |
Chance of precipitation in December
Juneau gets around 10.8 in of rain and snow over 21.1 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 68% and peaks near 71% on the wettest days, and about 20 days bring snow. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 70 | 70 | 70 | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 69 | 68 | 68 | 67 | 66 | 66 | 65 | 64 | 64 | 63 | 62 | 62 | 61 | 61 |
| Snow chance (%) | 66 | 66 | 66 | 66 | 67 | 67 | 67 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 67 | 67 | 66 | 65 | 65 | 64 | 63 | 62 | 62 | 61 | 61 | 60 | 60 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 70 | 66 |
| 2 | 70 | 66 |
| 3 | 70 | 66 |
| 4 | 70 | 66 |
| 5 | 70 | 67 |
| 6 | 71 | 67 |
| 7 | 71 | 67 |
| 8 | 71 | 68 |
| 9 | 71 | 68 |
| 10 | 71 | 68 |
| 11 | 71 | 69 |
| 12 | 71 | 69 |
| 13 | 71 | 69 |
| 14 | 71 | 69 |
| 15 | 71 | 69 |
| 16 | 70 | 69 |
| 17 | 70 | 68 |
| 18 | 69 | 68 |
| 19 | 68 | 67 |
| 20 | 68 | 67 |
| 21 | 67 | 66 |
| 22 | 66 | 65 |
| 23 | 66 | 65 |
| 24 | 65 | 64 |
| 25 | 64 | 63 |
| 26 | 64 | 62 |
| 27 | 63 | 62 |
| 28 | 62 | 61 |
| 29 | 62 | 61 |
| 30 | 61 | 60 |
| 31 | 61 | 60 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in December
Winds average 6 mph in December, the windiest month of the year.
Across December, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in December
Daylight runs from about 6 h 36 min at the start of December to 6 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 24 minutes over December. Sunrise moves from 8:30 AM to 8:56 AM, and sunset from 3:05 PM to 3:05 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 6.6 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.2 |
| Sunrise (AM) | 8:30 | 8:32 | 8:34 | 8:35 | 8:37 | 8:38 | 8:40 | 8:41 | 8:43 | 8:44 | 8:45 | 8:47 | 8:48 | 8:49 | 8:50 | 8:51 | 8:52 | 8:53 | 8:53 | 8:54 | 8:55 | 8:55 | 8:55 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 | 8:56 |
| Sunset (PM) | 3:05 | 3:04 | 3:03 | 3:02 | 3:01 | 3:00 | 3:00 | 2:59 | 2:59 | 2:58 | 2:58 | 2:57 | 2:57 | 2:57 | 2:57 | 2:57 | 2:57 | 2:57 | 2:57 | 2:57 | 2:58 | 2:58 | 2:59 | 2:59 | 3:00 | 3:01 | 3:02 | 3:02 | 3:03 | 3:04 | 3:05 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 6.6 | 8:30 | 3:05 |
| 2 | 6.5 | 8:32 | 3:04 |
| 3 | 6.5 | 8:34 | 3:03 |
| 4 | 6.4 | 8:35 | 3:02 |
| 5 | 6.4 | 8:37 | 3:01 |
| 6 | 6.4 | 8:38 | 3:00 |
| 7 | 6.3 | 8:40 | 3:00 |
| 8 | 6.3 | 8:41 | 2:59 |
| 9 | 6.3 | 8:43 | 2:59 |
| 10 | 6.2 | 8:44 | 2:58 |
| 11 | 6.2 | 8:45 | 2:58 |
| 12 | 6.2 | 8:47 | 2:57 |
| 13 | 6.2 | 8:48 | 2:57 |
| 14 | 6.1 | 8:49 | 2:57 |
| 15 | 6.1 | 8:50 | 2:57 |
| 16 | 6.1 | 8:51 | 2:57 |
| 17 | 6.1 | 8:52 | 2:57 |
| 18 | 6.1 | 8:53 | 2:57 |
| 19 | 6.1 | 8:53 | 2:57 |
| 20 | 6.1 | 8:54 | 2:57 |
| 21 | 6.1 | 8:55 | 2:58 |
| 22 | 6.1 | 8:55 | 2:58 |
| 23 | 6.1 | 8:55 | 2:59 |
| 24 | 6.1 | 8:56 | 2:59 |
| 25 | 6.1 | 8:56 | 3:00 |
| 26 | 6.1 | 8:56 | 3:01 |
| 27 | 6.1 | 8:56 | 3:02 |
| 28 | 6.1 | 8:56 | 3:02 |
| 29 | 6.1 | 8:56 | 3:03 |
| 30 | 6.1 | 8:56 | 3:04 |
| 31 | 6.2 | 8:56 | 3:05 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 0.29 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 0.29 kWh/m² to a high of 5.09 kWh/m² in May across the year — December's 0.29 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 0.3 | Dim |
| 2 | 0.3 | Dim |
| 3 | 0.3 | Dim |
| 4 | 0.3 | Dim |
| 5 | 0.3 | Dim |
| 6 | 0.3 | Dim |
| 7 | 0.3 | Dim |
| 8 | 0.3 | Dim |
| 9 | 0.3 | Dim |
| 10 | 0.3 | Dim |
| 11 | 0.3 | Dim |
| 12 | 0.3 | Dim |
| 13 | 0.3 | Dim |
| 14 | 0.3 | Dim |
| 15 | 0.3 | Dim |
| 16 | 0.3 | Dim |
| 17 | 0.3 | Dim |
| 18 | 0.3 | Dim |
| 19 | 0.3 | Dim |
| 20 | 0.3 | Dim |
| 21 | 0.3 | Dim |
| 22 | 0.3 | Dim |
| 23 | 0.3 | Dim |
| 24 | 0.3 | Dim |
| 25 | 0.3 | Dim |
| 26 | 0.3 | Dim |
| 27 | 0.3 | Dim |
| 28 | 0.3 | Dim |
| 29 | 0.3 | Dim |
| 30 | 0.3 | Dim |
| 31 | 0.3 | Dim |
Is December a good time to visit Juneau?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Juneau.
What to pack for Juneau in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Juneau sees daytime highs around 29°F and nights near 21°F. Pack a warm layer, a heavy coat and rain gear. About 21 days see rain.
UV index in Juneau in December
Clear-sky midday UV in December peaks around 0. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Juneau peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 1 | 2 | 4 | 5 | 7 | 9 | 5 | 4 | 1 | 1 | 0 |
| Level | Low | Low | Moderate | Moderate | Moderate | High | Very high | High | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 1 | Low |
| Mar | 2 | Moderate |
| Apr | 4 | Moderate |
| May | 5 | Moderate |
| Jun | 7 | High |
| Jul | 9 | Very high |
| Aug | 5 | High |
| Sep | 4 | Moderate |
| Oct | 1 | Low |
| Nov | 1 | Low |
| Dec | 0 | Low |
Where is Juneau?
Juneau sits at 58.3°N, 134.4°W, 56 ft above sea level, in United States. The nearest listed city is Whitehorse, 168 mi away.
Topography around Juneau
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Juneau.
Within 2 miles, the terrain around Juneau has large variations in elevation — a maximum elevation change of 3,556 ft around an average of 945 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,486 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 7,946 ft.
The land around Juneau is covered by trees (57%) within 2 miles, trees (40%) and water (22%) within 10 miles, and trees (35%), snow and ice (25%) and water (24%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Juneau (58.3019°, -134.4197°, elevation 56 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).