Ketchikan Gateway Borough (Ketchikan)
September
Weather in Ketchikan Gateway Borough, Alaska for September 2026
Your guide to Ketchikan Gateway Borough weather in September - trends and predictions
So far, September 2026 in Ketchikan Gateway Borough is slightly warmer than the historical average by 0.7 °F.
Expect cooler weather in the next days in Ketchikan Gateway Borough with the forecast suggesting a temperature of 13.6 °F, lower than the historical average.
In general, the average temperature in Ketchikan Gateway Borough at the beginning of September is 16 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 13.3 °F by the end of September.
Ketchikan Gateway Borough experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 614.6 mm.
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Temperatures
Rain 🌧️
More
6
Dry days
24
Rainy days
0
Snow days
13°/9°
Temperatures
15 km/h
Avg max wind
86 %
Avg humidity
Ketchikan Gateway Borough Weather September
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Temperatures trend during September in Ketchikan Gateway Borough
See the weather trend as well as the moving average line
September weather in Ketchikan Gateway Borough day by day
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| 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 |  Moderate rain | 16° /9° | 22.6 mm | 4 | |
| Sept. 12 | Moderate rain | 14° /10° | 6.7 mm | 3 | |
| Sept. 13 |  Mist | 14° /9° | 17.5 mm | 3 | |
| Sept. 14 | Overcast | 14° /9° | 11.8 mm | 3 | |
| Sept. 15 | Overcast | 16° /11° | 0 mm | 3.4 | |
| Sept. 16 | Patchy rain possible | 16° /11° | 0.3 mm | 3.1 | |
| Sept. 17 | Overcast | 15° /11° | 1.5 mm | 4 | |
| Sept. 18 | Light rain shower | 12° /11° | 28.3 mm | 3 | |
| Sept. 19 | Light rain shower | 12° /10° | 41.2 mm | 3 | |
| Sept. 20 | Light rain shower | 11° /10° | 19.1 mm | 3 | |
| Sept. 21 | Patchy rain possible | 13° /9° | 18.4 mm | 3 | |
| Sept. 22 | Overcast | 12° /8° | 0.2 mm | 3 | |
| Sept. 23 | Light rain shower | 10° /8° | 12.3 mm | 2 | |
| Sept. 24 | Overcast | 10° /8° | 3.1 mm | 2 | |
| Sept. 25 | Light rain shower | 12° /9° | 6.5 mm | 3 | |
| Sept. 26 | Overcast | 16° /11° | 0 mm | 5 | |
| Sept. 27 | Overcast | 17° /11° | 0 mm | 4 | |
| Sept. 28 | Overcast | 18° /13° | 0 mm | 5 | |
| Sept. 29 |  Partly cloudy | 10° /7° | 19.4 mm | 3 | |
| Sept. 30 | Overcast | 10° /7° | 23.8 mm | 3 | |
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Important Notice
Our weather forecast for Ketchikan Gateway Borough 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 Ketchikan Gateway Borough forecast closer to your planned date for the most up-to-date weather information.
Change Month
Ketchikan Gateway Borough in September - FAQ
What are the expected maximum and minimum temperatures in Ketchikan Gateway Borough during September?
During September, expect a variety of temperatures with highs around 13° and lows near 9°, suitable for diverse activities and preferences.
How much rainfall should be expected in Ketchikan Gateway Borough during September?
Significant rainfall exceeding 614.6 mm is expected in Ketchikan Gateway Borough during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Ketchikan Gateway Borough during September?
The average wind speed in Ketchikan Gateway Borough during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Ketchikan Gateway Borough
Explore the daily rainfall trends and prepare for Ketchikan Gateway Boroughs September weather 💧
Typically, Ketchikan Gateway Borough has 24 rainy days in September with a total of 614.6 mm of rainfall.
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Where is Ketchikan Gateway Borough?Get accurate weather forecasts for Ketchikan Gateway Borough, located at latitude 55.342 and longitude -131.648. Stay updated with localized weather information tailored for Ketchikan Gateway Borough.
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