Weather in Sitka, Alaska for September 2025
Special Weather Statement - See hour by hour.
Until now, September 2025 in Sitka has been nearly identical to the historical average, with a temperature of 12.7 °F (showing only a slight deviation of -0.3 °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 13 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 10.3 °F by the end of September.
Sitka experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 403.4 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
Sitka Weather September
Temperatures trend during September in Sitka
September weather in Sitka day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 14° /10° | 0.8 mm | 3 | |
| Sept. 2 | Patchy rain possible | 14° /9° | 0.3 mm | 3 | |
| Sept. 3 |  Light drizzle | 13° /10° | 0.8 mm | 3 | |
| Sept. 4 | Light drizzle | 13° /10° | 6.8 mm | 3 | |
| Sept. 5 | Light drizzle | 12° /9° | 10.3 mm | 3 | |
| Sept. 6 | Light rain | 12° /10° | 6.1 mm | 3 | |
| Sept. 7 | Patchy rain possible | 13° /10° | 0.9 mm | 3 | |
| Sept. 8 | Patchy rain possible | 13° /8° | 1.8 mm | 3 | |
| Sept. 9 | Patchy rain possible | 13° /8° | 8.3 mm | 3 | |
| Sept. 10 | Light rain shower | 14° /9° | 58.5 mm | 3 | |
| Sept. 11 | Patchy rain possible | 14° /8° | 20.2 mm | 3 | |
| Sept. 12 |  Moderate or heavy rain with thunder | 11° /10° | 16.2 mm | 3 | |
| Sept. 13 | Light rain shower | 12° /10° | 5.4 mm | 3 | |
| Sept. 14 |  Mist | 10° /8° | 0 mm | 0.6 | |
| Sept. 15 |  Heavy rain | 13° /10° | 25.3 mm | 0.1 | |
| Sept. 16 |  Moderate rain | 14° /12° | 18.9 mm | 0.4 | |
| Sept. 17 | Moderate rain | 14° /11° | 9.5 mm | 0.2 | |
| Sept. 18 | Patchy rain possible | 14° /9° | 0.9 mm | 0 | |
| Sept. 19 | Moderate rain | 13° /11° | 6.4 mm | 3 | |
| Sept. 20 | Moderate rain | 14° /11° | 6.3 mm | 3 | |
| Sept. 21 | Moderate rain | 11° /10° | 13.2 mm | 3 | |
| Sept. 22 | Patchy rain possible | 12° /9° | 4.7 mm | 3 | |
| Sept. 23 | Patchy rain possible | 13° /9° | 0.8 mm | 3 | |
| Sept. 24 | Patchy rain possible | 12° /8° | 1.2 mm | 3 | |
| Sept. 25 | Patchy rain possible | 11° /7° | 0.2 mm | 2 | |
| Sept. 26 |  Partly cloudy | 13° /7° | 0 mm | 3 | |
| Sept. 27 | Patchy rain possible | 14° /6° | 0.1 mm | 2 | |
| Sept. 28 | Fog | 7° /6° | 1 mm | 2 | |
| Sept. 29 | Fog | 7° /6° | 0 mm | 2 | |
| Sept. 30 |  Moderate or heavy rain shower | 8° /7° | 47.6 mm | 2 | |
| Next | |||||
Sitka in September - FAQ
September rainfall patterns in Sitka
Quick links
Where is Sitka?Get accurate weather forecasts for Sitka, located at latitude 57.053 and longitude -135.331. Stay updated with localized weather information tailored for Sitka.