Big Delta Weather in September
Average highs run from 62°F on September 1 to 47°F on September 30, and lows from 40°F to 29°F. Normal precipitation for the month is 1.16 in over about 11 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
- 35°F
- Precipitation
- 1.16 in
- Snowfall
- 1.7 in
- Record high
- 79°FSep 1, 1963
- Record low
- -2°FSep 27, 1983
- Chance of a freeze
- 99%
- Daylight
- 14 h 31 min to 11 h 25 min
- Cloud cover
- 70%
- Humidity
- 77%
- Dew point
- 34°F
- Wind
- 6.0 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 | 62°F | 40°F | 79°F 1963 | 27°F 1962 | 42% | 1% |
| Sep 2 | 62°F | 39°F | 72°F 1942 | 19°F 1980 | 41% | 1% |
| Sep 3 | 61°F | 39°F | 72°F 1949 | 25°F 1983 | 41% | 1% |
| Sep 4 | 61°F | 39°F | 72°F 1963 | 26°F 1992 | 40% | 1% |
| Sep 5 | 61°F | 38°F | 77°F 1957 | 27°F 1961 | 40% | 1% |
| Sep 6 | 60°F | 38°F | 71°F 1986 | 25°F 1952 | 39% | 1% |
| Sep 7 | 60°F | 38°F | 71°F 1946 | 20°F 1952 | 39% | 2% |
| Sep 8 | 60°F | 37°F | 74°F 1989 | 21°F 1945 | 39% | 2% |
| Sep 9 | 59°F | 37°F | 74°F 1989 | 26°F 1970 | 38% | 2% |
| Sep 10 | 59°F | 37°F | 71°F 1965 | 23°F 1970 | 38% | 2% |
| Sep 11 | 58°F | 36°F | 72°F 1965 | 25°F 1992 | 38% | 3% |
| Sep 12 | 58°F | 36°F | 71°F 2007 | 26°F 1959 | 37% | 3% |
| Sep 13 | 57°F | 36°F | 72°F 2014 | 24°F 2015 | 37% | 3% |
| Sep 14 | 57°F | 35°F | 70°F 2014 | 21°F 2003 | 37% | 4% |
| Sep 15 | 56°F | 35°F | 69°F 1973 | 19°F 1992 | 36% | 4% |
| Sep 16 | 56°F | 35°F | 66°F 1973 | 4°F 1992 | 36% | 4% |
| Sep 17 | 55°F | 34°F | 65°F 1967 | 17°F 1972 | 36% | 5% |
| Sep 18 | 55°F | 34°F | 65°F 1995 | 18°F 2003 | 36% | 5% |
| Sep 19 | 54°F | 33°F | 66°F 1995 | 12°F 1947 | 36% | 5% |
| Sep 20 | 54°F | 33°F | 68°F 1951 | 14°F 2003 | 35% | 6% |
| Sep 21 | 53°F | 33°F | 74°F 1990 | 16°F 1972 | 35% | 6% |
| Sep 22 | 53°F | 32°F | 67°F 1995 | 11°F 1972 | 35% | 7% |
| Sep 23 | 52°F | 32°F | 71°F 1942 | 5°F 1992 | 35% | 7% |
| Sep 24 | 51°F | 32°F | 73°F 1942 | 10°F 1992 | 35% | 8% |
| Sep 25 | 51°F | 31°F | 63°F 1976 | 12°F 1983 | 34% | 8% |
| Sep 26 | 50°F | 31°F | 60°F 1965 | 6°F 1983 | 34% | 9% |
| Sep 27 | 49°F | 30°F | 64°F 1945 | -2°F 1983 | 34% | 10% |
| Sep 28 | 49°F | 30°F | 62°F 1942 | 2°F 1992 | 34% | 10% |
| Sep 29 | 48°F | 29°F | 62°F 1966 | 10°F 2021 | 34% | 11% |
| Sep 30 | 47°F | 29°F | 66°F 2003 | -1°F 1992 | 34% | 11% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 6:27 AM, sunset 8:58 PM
- September 30
- sunrise 7:50 AM, sunset 7:15 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00509793 (Whitestone Farms), public domain. Records: NOAA GHCN-Daily, station USW00026415, 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.