Weather in Ketchikan, Alaska for September 2026
Until now, September 2026 in Ketchikan has been nearly identical to the historical average, with a temperature of 16 °F (showing only a slight deviation of 0.1 °F).
The forecast for the next days in Ketchikan predicts temperatures to be around 15 °F, close to the historical average.
In general, the average temperature in Ketchikan at the beginning of September is 16 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11.1 °F by the end of September.
Ketchikan experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 614.6 mm.
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Ketchikan Weather September
Temperatures trend during September in Ketchikan
September weather in Ketchikan day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 16° /11° | 7.7 mm | 4 | |
| Sept. 2 |  Overcast | 18° /10° | 0 mm | 4 | |
| Sept. 3 |  Cloudy | 16° /10° | 0 mm | 4 | |
| Sept. 4 | Overcast | 17° /11° | 2.5 mm | 4 | |
| Sept. 5 | Light rain shower | 15° /11° | 7.2 mm | 3 | |
| Sept. 6 | Cloudy | 15° /10° | 0.2 mm | 4 | |
| Sept. 7 | Patchy rain possible | 15° /10° | 0.2 mm | 3 | |
| Sept. 8 | Light rain shower | 15° /11° | 3.7 mm | 3 | |
| Sept. 9 | Overcast | 16° /10° | 7.6 mm | 3 | |
| Sept. 10 |  Patchy light drizzle | 15° /10° | 1.8 mm | 3 | |
| Sept. 11 |  Sunny | 16° /9° | 0.1 mm | 3.4 | |
| Sept. 12 | Sunny | 16° /11° | 0 mm | 3.8 | |
| Sept. 13 | Sunny | 17° /10° | 0 mm | 3.4 | |
| Sept. 14 | Overcast | 16° /11° | 0 mm | 3.5 | |
| Sept. 15 | Sunny | 16° /10° | 0 mm | 5 | |
| Sept. 16 | Sunny | 17° /11° | 0 mm | 5 | |
| Sept. 17 |  Partly cloudy | 17° /12° | 0 mm | 5 | |
| Sept. 18 | Overcast | 16° /12° | 0 mm | 4 | |
| Sept. 19 | Overcast | 15° /11° | 6.7 mm | 4 | |
| Sept. 20 | Light rain shower | 13° /10° | 7.5 mm | 3 | |
| Sept. 21 | Light rain shower | 13° /10° | 9.3 mm | 3 | |
| Sept. 22 | Sunny | 13° /9° | 0 mm | 4 | |
| Sept. 23 | Sunny | 14° /9° | 0 mm | 4 | |
| Sept. 24 | Sunny | 15° /9° | 0 mm | 4 | |
| Sept. 25 | Light rain | 11° /8° | 35.6 mm | 3 | |
| Sept. 26 |  Moderate or heavy rain with thunder | 11° /8° | 38.5 mm | 3 | |
| Sept. 27 | Light rain shower | 11° /8° | 25.7 mm | 3 | |
| Sept. 28 | Patchy rain possible | 10° /7° | 1.6 mm | 2 | |
| Sept. 29 | Partly cloudy | 10° /7° | 19.4 mm | 3 | |
| Sept. 30 | Overcast | 10° /7° | 23.8 mm | 3 | |
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Ketchikan in September - FAQ
What are the expected maximum and minimum temperatures in Ketchikan during September?
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September rainfall patterns in Ketchikan
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Where is Ketchikan?Get accurate weather forecasts for Ketchikan, located at latitude 55.342 and longitude -131.648. Stay updated with localized weather information tailored for Ketchikan.