Alaska weather in September 2025
Alaska weather in September 2025
Day
12 °C
Night
5 °C
Sea
9 °C
Precipitation
157 mm
in month
Rainy days
16 days
in month
Daylight
13 hours
average
Sunshine
5 hours
average
Humidity
80 %
Day
12 °C
Night
5 °C
Sea
9 °C
Precipitation
157 mm
in month
Rainy days
16 days
in month
Daylight
13 hours
average
Sunshine
5 hours
average
Humidity
80 %
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Weather overview and FAQs
Weather overview
In September in Alaska, the average air temperature ranges from 12 °C (54 °F) during the day to 5 °C (41 °F) at night. There are 16 days of rain on average, where the rainfall is 157 mm (6.19 in).
Is September a good month to visit Alaska?
In September there are not good conditions to visit Alaska. A relatively low temperature of 12 °C (54 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The night temperature of 5 °C (41 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.
What temperature can I expect during the day in September in Alaska?
In September in Alaska, the average daily temperatures will be 12 °C (54 °F). Don't forget a sweater and light or normal jacket, but also pack light clothing in case the temperatures are above average. The weather at this time can be somewhat changeable and a wide range of clothing can become handy.
How many hours of sun to expect in September in Alaska?
There is an average length of sunshine of 5 hours per day in September in Alaska.
What is the rainfall intensity in September in Alaska?
There is precipitation of 157 mm (6.19 in) in September in Alaska, which means 5 mm (0.20 in) rainfall per day on average.
How many days of precipitation on average can I expect in Alaska in September?
There are 16 days, which are rainy in Alaska in September, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.8 days of the week, or in general - 55 % days.
What is the night temperature in Alaska in September?
The average night temperature in Alaska in September is 5 °C (41 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
Is there a wet season in Alaska in September?
No, there is no wet season in September in Alaska - you can expect 16 days of rain during the month.
Is there a dry season in September in Alaska?
No, September is not a dry month in Alaska, expect rain approximately 16 days in a month.
Is the temperature rising or falling in the course of time in September in Alaska?
During September in Alaska, the day temperatures are decreasing - from 14 °C (58 °F) at the beginning of the month to 9 °C (49 °F) at the end of the month.
How humid is Alaska in September?
In September in Alaska, expect humidity around 80 %.
How long is the day (from dawn till dusk) in Alaska in September?
The length of daylight in Alaska in September is 13 hours.
Is Alaska rainier in September than in August?
Yes, Alaska is a rainier September than in August.
Is the weather in Alaska warmer in September than in August?
No, September is not warmer in Alaska than August.
How windy is Alaska in September?
In September in Alaska, there will be an average wind scale of 3.