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.
Temperatures
30° / 19°
Rainy Days
6
Snowy Days
0
Dry Days
24
Rainfall
129
mm
Sun Hours
8.9
Hrs
