Alaska weather

Our guide to the weather in Alaska during September

9

Average high

1

UV Index

69mm

Monthly rainfall

80%

Humidity

We've looked at the most up-to-date weather data for Alaska, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Alaska weather in September.

What's the temperature like in Alaska during September?

It's cold in Alaska during September. The temperature tops out at around 9℃ during the day, falling away to 2℃ at night. The UV index will be low at this time of year, so not something to worry about. However, if you're going to be outside for long periods it's always a good idea to apply a small amount of sunscreen to exposed skin.

Does it snow in Alaska during September?

Possibly. There's a chance of snow during September but not as much as you might think. Check the local forecast before you leave home so that you can pack appropriate footwear and clothing.

Does it rain in Alaska during September?

On average, there will be 6 rainy days during the month, amounting to 68.9mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. You're not likely to see a thunderstorm during your trip.

Is it windy in Alaska during September?

You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. With cool air temperatures, any breeze will feel cold.

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Alaska Blog posts

From the Ireland's most popular travel bloggers

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What to Wear on an Alaska Cruise: An Alaska Cruise Packing List

31st July 2023 by Eat Sleep Breathe Travel

Packing for an Alaska cruise proved to be quite a challenge. Although well-versed in packing for cruises to warmer destinations and even an expedition cruise to Antarctica, the task of preparing for ship life and outdoor adventures in Alaska was a new one. Deciding what to bring became a difficult decision....

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Is an Alaska Cruise Worth It: Honest Thoughts from a Non-Cruiser

31st July 2023 by Eat Sleep Breathe Travel

I was invited on a 7-day cruise to Alaska by Holland America, and I had mixed feelings. On one hand, I had heard many positive things about Alaska and it looked beautiful. On the other hand, I don't usually enjoy cruise trips as I prefer to travel slowly and seek out adventure. A big cruise trip did not seem to fit my style of travelling....

Weather in Alaska

Our month-by-month guide to the weather and climate in Alaska

-15.0

Alaska weather in

January
-9.8

Alaska weather in

February
-6.5

Alaska weather in

March
1.3

Alaska weather in

April
10.2

Alaska weather in

May
15.7

Alaska weather in

June
17.6

Alaska weather in

July
14.5

Alaska weather in

August
9.1

Alaska weather in

September
0.1

Alaska weather in

October
-10.7

Alaska weather in

November
-13.6

Alaska weather in

December