Sitka (AK)
September
Weather in Sitka, Alaska for September 2026
Your guide to Sitka weather in September - trends and predictions
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So far, September 2026 in Sitka is slightly warmer than the historical average by 1.5 °F.
The forecast for the next days in Sitka predicts temperatures to be around 13 °F, close to the historical average.
In general, the average temperature in Sitka at the beginning of September is 14.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 13.6 °F by the end of September.
Sitka experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 698.1 mm.
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Temperatures
Rain 🌧️
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5
Dry days
25
Rainy days
0
Snow days
11°/9°
Temperatures
13 km/h
Avg max wind
90 %
Avg humidity
Sitka Weather September
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Temperatures trend during September in Sitka
See the weather trend as well as the moving average line
September weather in Sitka day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 14° /10° | 3.1 mm | 2 | |
| Sept. 2 | Patchy rain possible | 15° /9° | 0.2 mm | 3 | |
| Sept. 3 |  Light drizzle | 16° /9° | 0.6 mm | 3 | |
| Sept. 4 | Light drizzle | 15° /9° | 4.5 mm | 3 | |
| Sept. 5 | Light drizzle | 14° /9° | 7.1 mm | 3 | |
| Sept. 6 | Light rain | 13° /10° | 4.1 mm | 2 | |
| Sept. 7 | Patchy rain possible | 13° /9° | 0.8 mm | 3 | |
| Sept. 8 | Patchy rain possible | 13° /9° | 20 mm | 2 | |
| Sept. 9 | Patchy rain possible | 13° /8° | 14.2 mm | 2 | |
| Sept. 10 | Light rain shower | 15° /9° | 39.1 mm | 3 | |
| Sept. 11 | Patchy rain possible | 15° /8° | 13.5 mm | 3 | |
| Sept. 12 |  Moderate or heavy rain with thunder | 13° /10° | 10.8 mm | 3 | |
| Sept. 13 | Light rain shower | 13° /9° | 3.6 mm | 2 | |
| Sept. 14 | Patchy rain possible | 13° /8° | 0.6 mm | 2 | |
| Sept. 15 |  Mist | 15° /8° | 1.1 mm | 0.5 | |
| Sept. 16 | Light rain shower | 12° /9° | 6.3 mm | 2.5 | |
| Sept. 17 |  Overcast | 14° /8° | 0.9 mm | 4 | |
| Sept. 18 |  Moderate or heavy rain shower | 12° /9° | 60.6 mm | 3 | |
| Sept. 19 | Patchy rain possible | 11° /7° | 4.9 mm | 3 | |
| Sept. 20 | Light rain shower | 11° /7° | 15.2 mm | 3 | |
| Sept. 21 | Patchy rain possible | 11° /7° | 4.3 mm | 3 | |
| Sept. 22 | Patchy rain possible | 11° /6° | 1.2 mm | 3 | |
| Sept. 23 | Overcast | 12° /6° | 0 mm | 3 | |
| Sept. 24 | Overcast | 13° /6° | 0.5 mm | 3 | |
| Sept. 25 | Light rain shower | 10° /7° | 14.3 mm | 2 | |
| Sept. 26 |  Sunny | 15° /6° | 0.3 mm | 5 | |
| Sept. 27 | Overcast | 20° /11° | 0 mm | 4 | |
| Sept. 28 | Overcast | 20° /13° | 0 mm | 4 | |
| Sept. 29 | Fog | 8° /7° | 10.4 mm | 2 | |
| Sept. 30 | Moderate or heavy rain shower | 9° /7° | 25.4 mm | 3 | |
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Important Notice
Our weather forecast for Sitka in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sitka forecast closer to your planned date for the most up-to-date weather information.
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Sitka in September - FAQ
What are the expected maximum and minimum temperatures in Sitka during September?
During September, expect a variety of temperatures with highs around 11° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sitka during September?
Significant rainfall exceeding 698.1 mm is expected in Sitka during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sitka during September?
The average wind speed in Sitka during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sitka
Explore the daily rainfall trends and prepare for Sitkas September weather 💧
Typically, Sitka has 25 rainy days in September with a total of 698.1 mm of rainfall.
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