Juneau Weather in September
Average highs run from 59°F on September 1 to 53°F on September 30, and lows from 49°F to 44°F. Normal precipitation for the month is 12.71 in.
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
- 56°F
- Average low
- 46°F
- Precipitation
- 12.71 in
- Record high
- 78°FSep 18, 1941
- Record low
- 23°FSep 24, 1972
- Chance of a freeze
- 3%
- Daylight
- 13 h 58 min to 11 h 32 min
- Cloud cover
- 77%
- Humidity
- 90%
- Dew point
- 40°F
- Wind
- 6.5 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 | 59°F | 49°F | 70°F 1942 | 29°F 1941 | 0% | |
| Sep 2 | 59°F | 48°F | 71°F 1942 | 30°F 1981 | 0% | |
| Sep 3 | 59°F | 48°F | 74°F 2025 | 35°F 1941 | 0% | |
| Sep 4 | 58°F | 48°F | 73°F 2025 | 34°F 1941 | 0% | |
| Sep 5 | 58°F | 48°F | 72°F 1949 | 35°F 1979 | 0% | |
| Sep 6 | 58°F | 48°F | 69°F 1995 | 33°F 1961 | 0% | |
| Sep 7 | 58°F | 48°F | 69°F 1995 | 32°F 1955 | 0% | |
| Sep 8 | 57°F | 47°F | 71°F 1989 | 30°F 1952 | 0% | |
| Sep 9 | 57°F | 47°F | 70°F 1941 | 30°F 2004 | 0% | |
| Sep 10 | 57°F | 47°F | 72°F 1989 | 29°F 1970 | ||
| Sep 11 | 57°F | 47°F | 72°F 2018 | 28°F 1970 | ||
| Sep 12 | 57°F | 47°F | 70°F 1997 | 30°F 1992 | ||
| Sep 13 | 56°F | 47°F | 67°F 1997 | 28°F 1992 | ||
| Sep 14 | 56°F | 47°F | 69°F 1974 | 32°F 1941 | ||
| Sep 15 | 56°F | 46°F | 72°F 2010 | 30°F 2006 | ||
| Sep 16 | 56°F | 46°F | 70°F 2010 | 29°F 1969 | ||
| Sep 17 | 56°F | 46°F | 70°F 1995 | 29°F 2018 | ||
| Sep 18 | 55°F | 46°F | 78°F 1941 | 27°F 1941 | ||
| Sep 19 | 55°F | 46°F | 75°F 1941 | 29°F 1941 | ||
| Sep 20 | 55°F | 46°F | 68°F 1995 | 28°F 1955 | ||
| Sep 21 | 55°F | 46°F | 67°F 1995 | 28°F 1955 | ||
| Sep 22 | 55°F | 45°F | 62°F 1965 | 28°F 1955 | ||
| Sep 23 | 54°F | 45°F | 64°F 1995 | 26°F 1972 | ||
| Sep 24 | 54°F | 45°F | 67°F 1995 | 23°F 1972 | ||
| Sep 25 | 54°F | 45°F | 61°F 1971 | 23°F 1972 | ||
| Sep 26 | 54°F | 45°F | 60°F 1942 | 23°F 1972 | ||
| Sep 27 | 54°F | 45°F | 68°F 1940 | 27°F 1983 | ||
| Sep 28 | 53°F | 44°F | 60°F 2017 | 26°F 1961 | ||
| Sep 29 | 53°F | 44°F | 65°F 2018 | 25°F 1971 | ||
| Sep 30 | 53°F | 44°F | 68°F 1940 | 28°F 1996 |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 5:58 AM, sunset 7:56 PM
- September 30
- sunrise 7:01 AM, sunset 6:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00504094 (Juneau Dwtn), public domain. Records: NOAA GHCN-Daily, station USW00025309, 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.