September · Alaska
Best time to visit Seward in September Weather, crowds & prices
Weather in Seward in September
Average temperature 7°C, 258 mm of rain, about 1 days with 6+ hours of sunshine and 91% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.7/10
Ranked #6 of 12 months
- Avg temp
- 7°C
- Rainfall
- 258 mm
- Humidity
- 91%
- Days with 6h+ sun
- 1
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Seward scores 3.7/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 7°C, 258 mm of rain, and roughly 1 days with 6+ hours of sunshine this month.
Seward sits at the head of Resurrection Bay with harbor cruises into Kenai Fjords and the start of the Iditarod trail.
September in Seward — off-season conditions
September averages 7°C (44°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
258 mm of rain puts this in monsoon territory — about 1 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 3.7/10 here, 6th of 12 months, against 7/10 in the destination's best month.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.
Figure on mid-season pricing, with crowds are moderate.
Flexible dates? June scores 3.3 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Seward in September?
- In September, Seward averages 7°C, 258 mm of rain, and about 1 days with 6+ hours of sunshine. Its climate-comfort score is 3.7/10.
- Is September a good time to visit Seward?
- September earns a 3.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Seward in September?
- Expect about 258 mm of rain in September. Average humidity is 91% and there are about 1 days with 6+ hours of sunshine.
Curated in Seward
Tickets & experiences
Things to do in Seward
Seward, Alaska. Live activities and tours from GetYourGuide, matched to this destination.