North Slope Borough Weather in September
Average highs run from 44°F on September 1 to 33°F on September 30, and lows from 34°F to 24°F. Normal precipitation for the month is 0.48 in over about 12 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
- 41°F
- Average low
- 31°F
- Precipitation
- 0.48 in
- Record high
- 67°FSep 6, 2019
- Record low
- 5°FSep 29, 1999
- Daylight
- 15 h 15 min to 11 h 14 min
- Cloud cover
- 76%
- Humidity
- 91%
- Dew point
- 32°F
- Wind
- 7.8 mph
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 44°F | 34°F | 63°F 2000 | 25°F 2005 | 42% |
| Sep 2 | 47°F | 34°F | 61°F 2009 | 29°F 2014 | 40% |
| Sep 3 | 48°F | 36°F | 66°F 2019 | 31°F 2000 | 40% |
| Sep 4 | 47°F | 36°F | 65°F 2024 | 32°F 2004 | 42% |
| Sep 5 | 48°F | 34°F | 66°F 2006 | 29°F 2004 | 42% |
| Sep 6 | 48°F | 34°F | 67°F 2019 | 26°F 2014 | 42% |
| Sep 7 | 46°F | 34°F | 63°F 2010 | 23°F 2014 | 41% |
| Sep 8 | 46°F | 33°F | 66°F 2019 | 27°F 2014 | 41% |
| Sep 9 | 43°F | 34°F | 62°F 2007 | 26°F 2003 | 40% |
| Sep 10 | 43°F | 33°F | 62°F 2001 | 30°F 2000 | 39% |
| Sep 11 | 44°F | 33°F | 65°F 2007 | 29°F 2003 | 40% |
| Sep 12 | 43°F | 33°F | 59°F 2011 | 25°F 2003 | 40% |
| Sep 13 | 44°F | 33°F | 62°F 2017 | 23°F 2008 | 41% |
| Sep 14 | 42°F | 32°F | 65°F 2006 | 23°F 2003 | 42% |
| Sep 15 | 41°F | 32°F | 65°F 2006 | 24°F 1998 | 43% |
| Sep 16 | 41°F | 31°F | 62°F 2006 | 24°F 2003 | 42% |
| Sep 17 | 41°F | 31°F | 61°F 2022 | 21°F 2000 | 43% |
| Sep 18 | 41°F | 30°F | 58°F 1998 | 17°F 2000 | 43% |
| Sep 19 | 39°F | 30°F | 53°F 2012 | 23°F 2004 | 43% |
| Sep 20 | 38°F | 30°F | 56°F 2016 | 20°F 2000 | 43% |
| Sep 21 | 36°F | 30°F | 55°F 2016 | 24°F 2002 | 43% |
| Sep 22 | 36°F | 28°F | 41°F 2007 | 24°F 2002 | 44% |
| Sep 23 | 35°F | 28°F | 46°F 2012 | 14°F 2013 | 44% |
| Sep 24 | 36°F | 26°F | 47°F 1998 | 13°F 2013 | 45% |
| Sep 25 | 35°F | 26°F | 51°F 1998 | 18°F 2009 | 44% |
| Sep 26 | 33°F | 25°F | 39°F 1998 | 16°F 2013 | 43% |
| Sep 27 | 34°F | 26°F | 42°F 2019 | 18°F 2010 | 43% |
| Sep 28 | 34°F | 25°F | 48°F 2019 | 11°F 2000 | 43% |
| Sep 29 | 33°F | 24°F | 45°F 2023 | 5°F 1999 | 42% |
| Sep 30 | 33°F | 24°F | 46°F 2002 | 6°F 1999 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 6:29 AM, sunset 9:44 PM
- September 30
- sunrise 8:20 AM, sunset 7:34 PM
Other months
Sources
Records: NOAA GHCN-Daily, station USW00027515, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.