Ketchikan Weather in September
Average highs run from 64°F on September 1 to 56°F on September 30, and lows from 53°F to 48°F. Normal precipitation for the month is 17.68 in over about 22 wet days.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 60°F
- Average low
- 50°F
- Precipitation
- 17.68 in
- Record high
- 80°FSep 1, 1918
- Record low
- 28°FSep 21, 1926
- Chance of a freeze
- 0%
- Daylight
- 13 h 46 min to 11 h 36 min
- Cloud cover
- 74%
- Humidity
- 89%
- Dew point
- 47°F
- Wind
- 5.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 64°F | 53°F | 80°F 1918 | 36°F 1919 | 69% | 0% |
| Sep 2 | 64°F | 53°F | 79°F 1942 | 36°F 1912 | 69% | 0% |
| Sep 3 | 63°F | 52°F | 76°F 1917 | 41°F 1912 | 70% | 0% |
| Sep 4 | 63°F | 52°F | 80°F 1949 | 36°F 1917 | 70% | 0% |
| Sep 5 | 63°F | 52°F | 80°F 2017 | 36°F 1912 | 70% | 0% |
| Sep 6 | 62°F | 52°F | 77°F 1949 | 37°F 1927 | 71% | 0% |
| Sep 7 | 62°F | 52°F | 74°F 1914 | 34°F 1927 | 71% | 0% |
| Sep 8 | 62°F | 52°F | 78°F 1940 | 37°F 1952 | 71% | 0% |
| Sep 9 | 62°F | 52°F | 77°F 1940 | 37°F 2004 | 72% | 0% |
| Sep 10 | 61°F | 51°F | 76°F 1923 | 36°F 1970 | 72% | 0% |
| Sep 11 | 61°F | 51°F | 79°F 1923 | 34°F 1986 | 72% | 0% |
| Sep 12 | 61°F | 51°F | 77°F 1950 | 32°F 1986 | 72% | 0% |
| Sep 13 | 61°F | 51°F | 76°F 1912 | 34°F 1927 | 73% | 0% |
| Sep 14 | 60°F | 51°F | 79°F 1912 | 32°F 1992 | 73% | 0% |
| Sep 15 | 60°F | 51°F | 80°F 1937 | 32°F 1926 | 73% | 0% |
| Sep 16 | 60°F | 51°F | 75°F 1929 | 30°F 1926 | 73% | 0% |
| Sep 17 | 60°F | 50°F | 78°F 1929 | 32°F 1914 | 74% | 0% |
| Sep 18 | 59°F | 50°F | 77°F 1957 | 29°F 1986 | 74% | 0% |
| Sep 19 | 59°F | 50°F | 79°F 1927 | 36°F 1923 | 74% | 0% |
| Sep 20 | 59°F | 50°F | 73°F 1975 | 36°F 1923 | 75% | 0% |
| Sep 21 | 59°F | 50°F | 74°F 1974 | 28°F 1926 | 75% | 0% |
| Sep 22 | 58°F | 49°F | 73°F 1928 | 28°F 1926 | 75% | 0% |
| Sep 23 | 58°F | 49°F | 76°F 1928 | 29°F 1926 | 75% | 0% |
| Sep 24 | 58°F | 49°F | 72°F 1967 | 30°F 1926 | 76% | 0% |
| Sep 25 | 58°F | 49°F | 73°F 1942 | 31°F 1972 | 76% | 0% |
| Sep 26 | 57°F | 49°F | 67°F 1919 | 29°F 1972 | 76% | 0% |
| Sep 27 | 57°F | 48°F | 73°F 1918 | 34°F 1919 | 76% | 0% |
| Sep 28 | 57°F | 48°F | 72°F 1918 | 33°F 1925 | 76% | 0% |
| Sep 29 | 57°F | 48°F | 74°F 1918 | 32°F 1925 | 76% | 0% |
| Sep 30 | 56°F | 48°F | 70°F 1936 | 32°F 1996 | 77% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 5:53 AM, sunset 7:39 PM
- September 30
- sunrise 6:48 AM, sunset 6:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00500657 (Beaver Falls), public domain. Records: NOAA GHCN-Daily, station USW00025325, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.