Seward (AK)
September
Weather in Seward, Alaska for September 2025
Your guide to Seward weather in September - trends and predictions
In general, the average temperature in Seward at the beginning of September is 12 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.1 °F by the end of September.
Seward experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 397.3 mm.
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Temperatures
Rain 🌧️
More
5
Dry days
25
Rainy days
0
Snow days
10°/6°
Temperatures
13 km/h
Avg max wind
86 %
Avg humidity
Seward Weather September
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Temperatures trend during September in Seward
See the weather trend as well as the moving average line
September weather in Seward day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 12° /7° | 2.7 mm | 3 | |
| Sept. 2 | Moderate rain at times | 12° /9° | 2.6 mm | 3 | |
| Sept. 3 |  Heavy rain at times | 13° /8° | 3.5 mm | 3 | |
| Sept. 4 | Moderate or heavy rain shower | 12° /9° | 43.5 mm | 3 | |
| Sept. 5 | Moderate or heavy rain shower | 11° /10° | 89.5 mm | 3 | |
| Sept. 6 | Moderate or heavy rain shower | 11° /9° | 35.3 mm | 3 | |
| Sept. 7 |  Patchy rain possible | 13° /7° | 0.3 mm | 3 | |
| Sept. 8 | Moderate rain at times | 11° /7° | 4.5 mm | 3 | |
| Sept. 9 | Moderate or heavy rain shower | 10° /7° | 20.5 mm | 3 | |
| Sept. 10 | Moderate rain at times | 11° /7° | 4.2 mm | 3 | |
| Sept. 11 | Moderate or heavy rain shower | 9° /7° | 32.5 mm | 2 | |
| Sept. 12 | Heavy rain at times | 9° /7° | 22.8 mm | 2 | |
| Sept. 13 |  Overcast | 14° /7° | 0 mm | 3 | |
| Sept. 14 | Moderate or heavy rain shower | 10° /5° | 21.3 mm | 3 | |
| Sept. 15 | Moderate or heavy rain shower | 11° /6° | 3.6 mm | 3 | |
| Sept. 16 | Moderate rain at times | 11° /5° | 1.5 mm | 3 | |
| Sept. 17 | Moderate or heavy rain shower | 8° /5° | 36.8 mm | 2 | |
| Sept. 18 | Heavy rain at times | 10° /5° | 4 mm | 3 | |
| Sept. 19 | Moderate rain at times | 12° /5° | 0.5 mm | 3 | |
| Sept. 20 | Patchy rain possible | 10° /5° | 0.2 mm | 3 | |
| Sept. 21 |  Sunny | 10° /4° | 0 mm | 4 | |
| Sept. 22 | Moderate rain at times | 8° /3° | 6.3 mm | 2 | |
| Sept. 23 | Moderate or heavy rain shower | 7° /4° | 24.3 mm | 2 | |
| Sept. 24 | Moderate or heavy rain shower | 8° /5° | 15.9 mm | 2 | |
| Sept. 25 | Moderate or heavy rain shower | 9° /5° | 6.4 mm | 2 | |
| Sept. 26 | Patchy rain possible | 9° /2° | 0.5 mm | 2 | |
| Sept. 27 | Sunny | 9° /1° | 0 mm | 3 | |
| Sept. 28 | Moderate rain at times | 6° /4° | 5.9 mm | 2 | |
| Sept. 29 |  Light rain | 7° /5° | 8.2 mm | 2 | |
| Sept. 30 |  Cloudy | 9° /1° | 0.1 mm | 2 | |
| Next | |||||
Important Notice
Our weather forecast for Seward 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 Seward forecast closer to your planned date for the most up-to-date weather information.
Change Month
Seward in September - FAQ
What are the expected maximum and minimum temperatures in Seward 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 Seward during September?
Significant rainfall exceeding 397.3 mm is expected in Seward during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Seward during September?
The average wind speed in Seward during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Seward
Explore the daily rainfall trends and prepare for Sewards September weather 💧
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