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Juneau weather in September 2025
Expect 12°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Juneau in September. Check more long-term weather averages for Juneau in September before you book your next holiday to Alaska in 2025/2026.
- 1212°C max day temperature
- 4 hours of sunshine per day
- 1919 days with some rainfall
- 44°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 210210 mm of monthly rainfall
- 33 (Moderate) UV index
- 1010°C sea temperature
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Recommended for Alaska
The September weather guide for Alaska (Juneau) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How warm is it in Juneau in September?
Daytime temperatures usually reach 12°C in Juneau in September, falling to 4°C at night.
How sunny is it in Juneau in September?
There are normally 4 hours of bright sunshine each day in Juneau in September - that's 28% of daylight hours.
Is the sea cold around Juneau in September?
The average sea temperature around Juneau in September is 10°C.
Does it rain in Juneau in September?
There are usually 19 days with some rain in Juneau in September and the average monthly rainfall is 210mm.
Juneau September sunrise & sunset times
Browse the sunrise and sunset times for Juneau in September 2025. Select a month to view Juneau sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 04:58 | 18:56 |
Monday, 15th September 2025 | 05:28 | 18:16 |
Tuesday, 30th September 2025 | 06:01 | 17:33 |
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