Click on a day for an hourly weather forecast
The weather in Seward in September is hot. The average temperatures are between 19°C and 30°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect about 3 to 8 days of rain in Seward during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Seward in September 2025.
If you’re planning to visit Seward in the near future, we highly recommend that you review the 14 day weather forecast for Seward before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 0° | 3 | 26 | 2 | 44 mm | Bad | Seward in January |
| February | 10° / 1° | 3 | 21 | 4 | 58 mm | Bad | Seward in February |
| March | 17° / 7° | 4 | 26 | 1 | 80 mm | Good | Seward in March |
| April | 21° / 10° | 6 | 24 | 0 | 121 mm | Good | Seward in April |
| May | 25° / 15° | 9 | 22 | 0 | 170 mm | Good | Seward in May |
| June | 32° / 21° | 7 | 23 | 0 | 116 mm | Ok | Seward in June |
| July | 35° / 23° | 6 | 25 | 0 | 113 mm | Ok | Seward in July |
| August | 34° / 22° | 6 | 25 | 0 | 111 mm | Ok | Seward in August |
| September | 30° / 19° | 6 | 24 | 0 | 129 mm | Good | Seward in September |
| October | 22° / 12° | 5 | 26 | 0 | 114 mm | Good | Seward in October |
| November | 16° / 6° | 3 | 27 | 1 | 50 mm | Good | Seward in November |
| December | 10° / 2° | 3 | 26 | 3 | 45 mm | Bad | Seward in December |