Yukon-Koyukuk Census Area Weather in September
Average highs run from 59°F on September 1 to 44°F on September 30, and lows from 39°F to 28°F. Normal precipitation for the month is 1.68 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
- 52°F
- Average low
- 34°F
- Precipitation
- 1.68 in
- Snowfall
- 0.8 in
- Record high
- 78°FSep 5, 1957
- Record low
- 4°FSep 24, 1992
- Chance of a freeze
- 100%
- Daylight
- 14 h 43 min to 11 h 22 min
- Cloud cover
- 70%
- Humidity
- 86%
- Dew point
- 35°F
- Wind
- 7.6 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 | 39°F | 75°F 1978 | 20°F 1933 | 43% | 1% |
| Sep 2 | 58°F | 38°F | 75°F 1918 | 16°F 1922 | 43% | 1% |
| Sep 3 | 58°F | 38°F | 73°F 1957 | 19°F 1940 | 42% | 1% |
| Sep 4 | 58°F | 38°F | 72°F 1917 | 22°F 2014 | 42% | 1% |
| Sep 5 | 57°F | 37°F | 78°F 1957 | 19°F 1921 | 42% | 1% |
| Sep 6 | 57°F | 37°F | 73°F 1957 | 17°F 1952 | 42% | 1% |
| Sep 7 | 56°F | 37°F | 69°F 1957 | 11°F 1952 | 41% | 1% |
| Sep 8 | 56°F | 36°F | 69°F 1979 | 17°F 1970 | 41% | 1% |
| Sep 9 | 55°F | 36°F | 70°F 2010 | 14°F 1970 | 41% | 1% |
| Sep 10 | 55°F | 36°F | 73°F 1965 | 19°F 1970 | 40% | 2% |
| Sep 11 | 54°F | 35°F | 72°F 1965 | 20°F 1927 | 40% | 2% |
| Sep 12 | 54°F | 35°F | 68°F 1979 | 19°F 1927 | 40% | 2% |
| Sep 13 | 53°F | 35°F | 69°F 2010 | 18°F 1935 | 39% | 2% |
| Sep 14 | 53°F | 34°F | 68°F 1965 | 17°F 1928 | 39% | 2% |
| Sep 15 | 52°F | 34°F | 70°F 2010 | 11°F 1939 | 39% | 2% |
| Sep 16 | 52°F | 33°F | 68°F 1919 | 13°F 1992 | 38% | 3% |
| Sep 17 | 51°F | 33°F | 65°F 1973 | 16°F 1927 | 38% | 3% |
| Sep 18 | 51°F | 33°F | 64°F 1995 | 16°F 1939 | 38% | 3% |
| Sep 19 | 50°F | 32°F | 65°F 1995 | 9°F 1933 | 37% | 4% |
| Sep 20 | 50°F | 32°F | 70°F 1995 | 12°F 1939 | 37% | 4% |
| Sep 21 | 49°F | 32°F | 73°F 1995 | 13°F 1954 | 37% | 4% |
| Sep 22 | 49°F | 31°F | 65°F 1995 | 9°F 1992 | 36% | 5% |
| Sep 23 | 48°F | 31°F | 67°F 1934 | 7°F 1992 | 36% | 5% |
| Sep 24 | 47°F | 30°F | 68°F 1934 | 4°F 1992 | 35% | 6% |
| Sep 25 | 47°F | 30°F | 64°F 1934 | 5°F 1983 | 35% | 6% |
| Sep 26 | 46°F | 30°F | 68°F 2017 | 4°F 1983 | 34% | 7% |
| Sep 27 | 46°F | 29°F | 64°F 1934 | 8°F 1992 | 34% | 7% |
| Sep 28 | 45°F | 29°F | 66°F 1934 | 8°F 2010 | 33% | 8% |
| Sep 29 | 44°F | 28°F | 60°F 2017 | 8°F 1992 | 33% | 8% |
| Sep 30 | 44°F | 28°F | 59°F 2003 | 7°F 1952 | 32% | 9% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 6:48 AM, sunset 9:31 PM
- September 30
- sunrise 8:19 AM, sunset 7:41 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00026529 (Tanana Calhoun Mem AP), public domain. Records: NOAA GHCN-Daily, station USW00026529, 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.