Girdwood Weather in September
Average highs run from 61°F on September 1 to 51°F on September 30, and lows from 44°F to 37°F. Normal precipitation for the month is 8.26 in over about 20 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
- 56°F
- Average low
- 41°F
- Precipitation
- 8.26 in
- Record high
- 69°FSep 1, 2016
- Record low
- 21°FSep 28, 2010
- Chance of a freeze
- 58%
- Daylight
- 14 h 12 min to 11 h 29 min
- Cloud cover
- 75%
- Humidity
- 88%
- Dew point
- 38°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 | 61°F | 44°F | 69°F 2016 | 33°F 2016 | 60% | 0% |
| Sep 2 | 61°F | 44°F | 67°F 2016 | 29°F 2015 | 60% | 0% |
| Sep 3 | 60°F | 44°F | 66°F 2026 | 33°F 2018 | 61% | 0% |
| Sep 4 | 60°F | 44°F | 65°F 2018 | 32°F 2009 | 61% | 0% |
| Sep 5 | 60°F | 43°F | 65°F 2009 | 29°F 2004 | 61% | 0% |
| Sep 6 | 59°F | 43°F | 66°F 2018 | 32°F 2001 | 62% | 0% |
| Sep 7 | 59°F | 43°F | 61°F 2000 | 28°F 2004 | 62% | 0% |
| Sep 8 | 59°F | 43°F | 63°F 2018 | 28°F 2004 | 62% | 0% |
| Sep 9 | 59°F | 42°F | 65°F 2026 | 28°F 2004 | 63% | 0% |
| Sep 10 | 58°F | 42°F | 63°F 2005 | 31°F 2018 | 63% | 0% |
| Sep 11 | 58°F | 42°F | 68°F 2026 | 29°F 2004 | 63% | 0% |
| Sep 12 | 58°F | 42°F | 65°F 2018 | 27°F 2020 | 63% | 0% |
| Sep 13 | 57°F | 41°F | 66°F 2018 | 28°F 2020 | 64% | 0% |
| Sep 14 | 57°F | 41°F | 66°F 2018 | 28°F 2003 | 64% | 0% |
| Sep 15 | 57°F | 41°F | 63°F 2009 | 24°F 2003 | 64% | 0% |
| Sep 16 | 56°F | 41°F | 60°F 2007 | 22°F 2003 | 64% | 0% |
| Sep 17 | 56°F | 41°F | 61°F 2006 | 24°F 2003 | 64% | 0% |
| Sep 18 | 56°F | 40°F | 63°F 2018 | 22°F 2004 | 65% | 1% |
| Sep 19 | 55°F | 40°F | 65°F 2010 | 23°F 2003 | 65% | 1% |
| Sep 20 | 55°F | 40°F | 60°F 2005 | 27°F 2013 | 65% | 1% |
| Sep 21 | 55°F | 40°F | 58°F 2012 | 27°F 2002 | 65% | 1% |
| Sep 22 | 54°F | 39°F | 59°F 2012 | 28°F 2015 | 65% | 1% |
| Sep 23 | 54°F | 39°F | 57°F 2010 | 25°F 2015 | 65% | 1% |
| Sep 24 | 54°F | 39°F | 68°F 2007 | 22°F 2015 | 65% | 1% |
| Sep 25 | 53°F | 38°F | 67°F 2007 | 24°F 2015 | 65% | 2% |
| Sep 26 | 53°F | 38°F | 62°F 2007 | 26°F 2014 | 65% | 2% |
| Sep 27 | 52°F | 38°F | 66°F 2007 | 22°F 2010 | 65% | 2% |
| Sep 28 | 52°F | 38°F | 60°F 2007 | 21°F 2010 | 65% | 2% |
| Sep 29 | 52°F | 37°F | 62°F 2003 | 23°F 2008 | 65% | 3% |
| Sep 30 | 51°F | 37°F | 62°F 2003 | 21°F 2021 | 64% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 6:50 AM, sunset 9:02 PM
- September 30
- sunrise 8:01 AM, sunset 7:30 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00500243 (Alyeska), public domain. Records: NOAA GHCN-Daily, station USW00026492, 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.