Weather in Seward, Alaska for September 2025
Until now, September 2025 in Seward has been nearly identical to the historical average, with a temperature of 11.7 °F (showing only a slight deviation of -0.1 °F).
Expect cooler weather in the next days in Seward with the forecast suggesting a temperature of 10.4 °F, lower than the historical average.
In general, the average temperature in Seward at the beginning of September is 12.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 8.6 °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.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
Seward Weather September
Temperatures trend during September in Seward
September weather in Seward day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 12° /6° | 2.1 mm | 3 | |
| Sept. 2 | Moderate rain at times | 14° /8° | 1.8 mm | 4 | |
| Sept. 3 |  Heavy rain at times | 13° /8° | 5.6 mm | 3 | |
| Sept. 4 | Moderate or heavy rain shower | 12° /8° | 22.3 mm | 3 | |
| Sept. 5 | Moderate or heavy rain shower | 13° /8° | 44.9 mm | 3 | |
| Sept. 6 | Moderate or heavy rain shower | 12° /9° | 19.4 mm | 3 | |
| Sept. 7 |  Patchy rain possible | 12° /7° | 18.7 mm | 3 | |
| Sept. 8 | Moderate rain at times | 11° /6° | 3.3 mm | 3 | |
| Sept. 9 | Moderate or heavy rain shower | 10° /7° | 22.2 mm | 3 | |
| Sept. 10 | Moderate rain at times | 11° /7° | 24.9 mm | 3 | |
| Sept. 11 | Moderate or heavy rain shower | 10° /7° | 23.3 mm | 3 | |
| Sept. 12 | Heavy rain at times | 10° /6° | 24.8 mm | 3 | |
| Sept. 13 |  Moderate rain | 11° /4° | 7.8 mm | 0.4 | |
| Sept. 14 | Patchy rain possible | 11° /2° | 1.1 mm | 0.4 | |
| Sept. 15 |  Heavy rain | 10° /4° | 25.7 mm | 0.1 | |
| Sept. 16 | Heavy rain | 13° /5° | 53.3 mm | 0.4 | |
| Sept. 17 | Moderate rain | 9° /7° | 13.1 mm | 0 | |
| Sept. 18 | Patchy rain possible | 11° /9° | 3.4 mm | 2 | |
| Sept. 19 | Moderate rain | 9° /8° | 7.5 mm | 2 | |
| Sept. 20 | Patchy rain possible | 9° /8° | 3.8 mm | 2 | |
| Sept. 21 |  Partly cloudy | 12° /7° | 0.1 mm | 3 | |
| Sept. 22 | Patchy rain possible | 10° /8° | 0.6 mm | 2 | |
| Sept. 23 | Patchy rain possible | 11° /7° | 0.1 mm | 2 | |
| Sept. 24 |  Cloudy | 11° /3° | 0.1 mm | 2 | |
| Sept. 25 | Patchy rain possible | 11° /2° | 0.8 mm | 2 | |
| Sept. 26 | Patchy rain possible | 7° /2° | 1.1 mm | 1 | |
| 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 | |||||
Seward in September - FAQ
September rainfall patterns in Seward
Quick links
Where is Seward?Get accurate weather forecasts for Seward, located at latitude 60.104 and longitude -149.444. Stay updated with localized weather information tailored for Seward.