Is Unalaska hot in September?
Days are typically cool at 12.5°C, while nights average 6.8°C.
United States · 1991–2020 normal
Unalaska in
September.
Typical September weather in Unalaska: 12.5°C by day, 6.8°C at night, 143 mm of rain over 16.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high12.5°C
Typical low6.8°C
Rain143 mm
Wet days16.3
In the year-round weather comparison, September scores 20 out of 100 (August leads the year at 47). Daylight is calculated as 12 h 37 from latitude 53.87°. Open-water sea temperature is 9.0°C (27 km from the place centre).
September at a glance
What is Unalaska like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 143 mm across about 16 wet days.
How much daylight is there?
There are about 12 h 37 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 4 of 12 in our weather comparison; August ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5877208
- NOAA station
- USC00502587 · DUTCH HARBOR
- Station distance
- 2.4 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Unalaska is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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