Temperature
Cool by day, brisk at night.
59°Ftypical September high
Typical range
September climate
September in Juneau
United States · North America
Cool days.
Some tradeoffs
Daytime high
59°F
Lows around 49°F
Rain
Rain most days
Sun
3.5 h/day
Air feel
Very dry
Sea temp
54°F
Too cold for swimming
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days. About 22 wet days, more than in most months.
73%wet-day frequency
Precip amountWet-day chanceSnowfall
Sunshine
Sunshine is limited, with cloud often dominating.
3.7 hSeptember sunshine
Heat & humidity by month
Very drySeptember Heat feel
Easy airWarm airHumid air
Hourly temperature pattern
In September, afternoons feel about 55° and nights feel near 47°.
FreezingVery coldColdCoolNight hours
Clear sky
Overcast skies this month.
19%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
5 mphSeptember Calm
Sea temperature
54°FSeptember sea temp
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 58°F, easing to about 55°F in early evening.
Avg temp Typical range
Morning53°F
Rain52%
Cloud82%
Humid airLow
Sun intensityMinimal
Best windowMidday57°F
Rain61%
Cloud83%
Humid airLow
Sun intensityLow
Late afternoon58°F
Rain60%
Cloud82%
Humid airLow
Sun intensityLow
Early evening55°F
Rain54%
Cloud79%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 33 | 25 | 10.5 | 21 | 2.6 | 78 | 44 |
| Feb | 35 | 26 | 7.5 | 17 | 3.2 | 78 | 43 |
| Mar | 39 | 28 | 7.1 | 18 | 4.4 | 75 | 43 |
| Apr | 46 | 35 | 5.9 | 18 | 6.1 | 77 | 44 |
| May | 56 | 42 | 5.7 | 17 | 7.5 | 78 | 47 |
| Jun | 64 | 51 | 5.6 | 18 | 6.3 | 80 | 51 |
| Jul | 66 | 55 | 7.3 | 19 | 5.9 | 84 | 55 |
| Aug | 66 | 55 | 9.6 | 20 | 5.2 | 85 | 56 |
| Sep | 59 | 49 | 13.2 | 22 | 3.7 | 85 | 54 |
| Oct | 49 | 40 | 13.3 | 23 | 2.1 | 84 | 51 |
| Nov | 38 | 30 | 10.1 | 21 | 2.0 | 80 | 48 |
| Dec | 34 | 26 | 10.8 | 21 | 1.3 | 79 | 46 |
Similar climates
Similar
Similar travel styleDunedinNew ZealandSimilar travel styleAnchorageUnited StatesSimilar travel styleOsloNorwaySimilar travel styleEl ChaltenArgentina
Want a side-by-side climate view? Compare Juneau with Dunedin.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology