September · Alaska
Best time to visit Sitka in September Weather, crowds & prices
Weather in Sitka in September
Average temperature 12°C, 331 mm of rain, about 0 days with 6+ hours of sunshine and 89% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
3.9/10
Ranked #6 of 12 months
- Avg temp
- 12°C
- Rainfall
- 331 mm
- Humidity
- 89%
- Days with 6h+ sun
- 0
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Sitka scores 3.9/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 12°C, 331 mm of rain, and roughly 0 days with 6+ hours of sunshine this month.
Sitka blends Russian-era cathedral domes with rainforest islands and whale-rich waters on the outer coast.
September in Sitka — the hardest end of the year
September averages 12°C (53°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
331 mm of rain puts this in monsoon territory — almost no days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 3.9/10 here, 6th of 12 months, against 6.7/10 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.
Figure on low-season pricing, with crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Flexible dates? June scores 2.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Sitka in September?
- In September, Sitka averages 12°C, 331 mm of rain, and about 0 days with 6+ hours of sunshine. Its climate-comfort score is 3.9/10.
- Is September a good time to visit Sitka?
- September earns a 3.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sitka in September?
- Expect about 331 mm of rain in September. Average humidity is 89% and there are about 0 days with 6+ hours of sunshine.
Curated in Sitka
Tickets & experiences
Things to do in Sitka
Sitka, Alaska. Live activities and tours from GetYourGuide, matched to this destination.