September · Alaska
Best time to visit Ketchikan in September Weather, crowds & prices
Weather in Ketchikan in September
Average temperature 12°C, 274 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
4.5/10
Ranked #6 of 12 months
- Avg temp
- 12°C
- Rainfall
- 274 mm
- Humidity
- 91%
- Days with 6h+ sun
- 1
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Ketchikan scores 4.5/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 12°C, 274 mm of rain, and roughly 1 days with 6+ hours of sunshine this month.
Ketchikan stacks totem poles and fishing docks along the Inside Passage, with Misty Fjords floatplane trips nearby.
September in Ketchikan — off-season conditions
September averages 12°C (53°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
274 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 4.5/10 here, 6th of 12 months, against 7.4/10 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 2.9 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Ketchikan in September?
- In September, Ketchikan averages 12°C, 274 mm of rain, and about 1 days with 6+ hours of sunshine. Its climate-comfort score is 4.5/10.
- Is September a good time to visit Ketchikan?
- September earns a 4.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Ketchikan in September?
- Expect about 274 mm of rain in September. Average humidity is 91% and there are about 1 days with 6+ hours of sunshine.
Curated in Ketchikan
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Ketchikan, Alaska. Live activities and tours from GetYourGuide, matched to this destination.