Ketchikan Gateway Borough (Ketchikan)
September
Weather in Ketchikan Gateway Borough, Alaska for September 2027
Your guide to Ketchikan Gateway Borough weather in September - trends and predictions
In general, the average temperature in Ketchikan Gateway Borough at the beginning of September is 15.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.6 °C by the end of September.
Ketchikan Gateway Borough in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 544.8 mm.
Is September a good time to visit Ketchikan Gateway Borough? check out the best time to travel to Ketchikan Gateway Borough page.
✨ Is September a good time to visit Ketchikan Gateway Borough? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
12
Dry days
18
Rainy days
0
Snow days
13°/9°
Temperatures
16 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 | 16° /11° | 7.7 mm | 4 | |
| Sept. 2 |  Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 3 |  Cloudy | 16° /10° | 0 mm | 4 | |
| Sept. 4 | Light rain | 16° /11° | 2.5 mm | 4 | |
| Sept. 5 | Light rain | 15° /11° | 7.2 mm | 3 | |
| Sept. 6 | Cloudy | 15° /11° | 0.2 mm | 4 | |
| Sept. 7 |  Patchy rain possible | 15° /11° | 0.2 mm | 3 | |
| Sept. 8 | Light rain | 15° /11° | 3.7 mm | 3 | |
| Sept. 9 | Light rain | 15° /10° | 7.6 mm | 3 | |
| Sept. 10 | Patchy light drizzle | 15° /10° | 1.8 mm | 3 | |
| Sept. 11 |  Moderate rain | 15° /10° | 22.6 mm | 4 | |
| Sept. 12 | Moderate rain | 14° /10° | 6.7 mm | 3 | |
| Sept. 13 | Moderate rain | 14° /9° | 17.5 mm | 3 | |
| Sept. 14 | Moderate rain | 13° /10° | 11.8 mm | 3 | |
| Sept. 15 |  Heavy rain | 14° /9° | 49.9 mm | 3 | |
| Sept. 16 | Moderate rain | 15° /10° | 23.6 mm | 3 | |
| Sept. 17 | Moderate rain | 14° /11° | 22.2 mm | 3 | |
| Sept. 18 | Moderate rain | 12° /9° | 12 mm | 2 | |
| Sept. 19 | Heavy rain | 12° /10° | 37.6 mm | 2 | |
| Sept. 20 | Heavy rain | 12° /9° | 39.8 mm | 2 | |
| Sept. 21 | Heavy rain | 12° /10° | 29 mm | 2 | |
| Sept. 22 | Heavy rain | 11° /9° | 47.8 mm | 2 | |
| Sept. 23 | Heavy rain | 10° /9° | 35.2 mm | 2 | |
| Sept. 24 | Moderate rain | 11° /8° | 20.4 mm | 2.9 | |
| Sept. 25 | Heavy rain | 11° /8° | 26.7 mm | 2.8 | |
| Sept. 26 | Heavy rain | 11° /8° | 35.1 mm | 2 | |
| Sept. 27 | Heavy rain | 11° /8° | 32.7 mm | 2 | |
| Sept. 28 | Light rain | 10° /8° | 3 mm | 2 | |
| Sept. 29 | Moderate rain | 10° /7° | 21.7 mm | 2 | |
| Sept. 30 | Moderate rain | 10° /7° | 18.7 mm | 2 | |
| Next | |||||
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 544.8 mm is expected in Ketchikan Gateway Borough during September, occurring over more than 18 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 16 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 18 rainy days in September with a total of 544.8 mm of rainfall.
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