Alaska
September
Weather in Alaska for September 2025
Your guide to Alaska weather in September - trends and predictions
In general, the average temperature in Alaska at the beginning of September is 13.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.7 °F by the end of September.
The climate of Alaska in September is notably wet, with an average of 14 rainy days.
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16
Dry days
14
Rainy days
0
Snow days
10°/6°
Temperatures
12 km/h
Avg max wind
79 %
Avg humidity
Alaska in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  14° | 2 13° | 3  14° | 4 14° | 5 12° | 6 13° | 7 12° |
| 8 12° | 9  12° | 10  12° | 11 11° | 12 11° | 13 11° | 14 11° |
| 15 12° | 16 11° | 17 11° | 18 9° | 19 10° | 20 10° | 21 8° |
| 22 9° | 23 10° | 24  9° | 25  9° | 26 9° | 27 8° | 28 8° |
| 29 9° | 30 9° |
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Temperatures trend during September in Alaska
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Light rain shower | 14° /10° | 1 mm | 3 | |
| Sept. 2 | Patchy rain possible | 13° /9° | 1.5 mm | 3 | |
| Sept. 3 | Light drizzle | 14° /10° | 2.6 mm | 4 | |
| Sept. 4 | Light rain | 14° /9° | 4 mm | 4 | |
| Sept. 5 | Light drizzle | 12° /9° | 3.5 mm | 3 | |
| Sept. 6 | Patchy rain possible | 13° /9° | 1.1 mm | 3 | |
| Sept. 7 | Light rain shower | 12° /8° | 7.5 mm | 3 | |
| Sept. 8 | Light rain | 12° /8° | 4.1 mm | 3 | |
| Sept. 9 | Moderate rain | 12° /8° | 9.7 mm | 3 | |
| Sept. 10 | Overcast | 12° /8° | 1.9 mm | 3 | |
| Sept. 11 | Light drizzle | 11° /8° | 5.2 mm | 3 | |
| Sept. 12 | Overcast | 11° /7° | 2.4 mm | 3 | |
| Sept. 13 | Overcast | 11° /7° | 0.5 mm | 3 | |
| Sept. 14 | Overcast | 11° /6° | 3.1 mm | 3 | |
| Sept. 15 | Overcast | 12° /7° | 2.9 mm | 3 | |
| Sept. 16 | Overcast | 11° /7° | 0.6 mm | 3 | |
| Sept. 17 | Overcast | 11° /7° | 0.1 mm | 3 | |
| Sept. 18 | Light drizzle | 9° /6° | 4.8 mm | 3 | |
| Sept. 19 | Overcast | 10° /5° | 0.1 mm | 3 | |
| Sept. 20 | Light rain shower | 10° /6° | 4.8 mm | 3 | |
| Sept. 21 | Patchy rain possible | 8° /3° | 0.7 mm | 3 | |
| Sept. 22 | Overcast | 9° /3° | 0.1 mm | 2 | |
| Sept. 23 | Overcast | 10° /4° | 0.3 mm | 3 | |
| Sept. 24 | Cloudy | 9° /4° | 0.9 mm | 2 | |
| Sept. 25 | Partly cloudy | 9° /4° | 0 mm | 3 | |
| Sept. 26 | Cloudy | 9° /5° | 0.1 mm | 2 | |
| Sept. 27 | Overcast | 8° /4° | 0.1 mm | 2 | |
| Sept. 28 | Partly cloudy | 8° /3° | 0 mm | 3 | |
| Sept. 29 | Overcast | 9° /4° | 0 mm | 3 | |
| Sept. 30 | Patchy rain possible | 9° /4° | 0.1 mm | 2 | |
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Important Notice
Our weather forecast for Alaska in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Alaska forecast closer to your planned date for the most up-to-date weather information.
Alaska in September - FAQ
What are the expected maximum and minimum temperatures in Alaska during September?
During September, expect a variety of temperatures with highs around 10° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Alaska during September?
Moderate rainfall is anticipated in Alaska during September, with a total of 71.3 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Alaska during September?
The average wind speed in Alaska during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Alaska
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