Wasilla Weather in September
Average highs run from 60°F on September 1 to 49°F on September 30, and lows from 44°F to 35°F. Normal precipitation for the month is 2.86 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
- 55°F
- Average low
- 40°F
- Precipitation
- 2.86 in
- Snowfall
- 0.1 in
- Record high
- 72°FSep 1, 1974
- Record low
- 17°FSep 22, 1992
- Chance of a freeze
- 82%
- Daylight
- 14 h 15 min to 11 h 28 min
- Cloud cover
- 75%
- Humidity
- 80%
- Dew point
- 38°F
- Wind
- 4.7 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 | 60°F | 44°F | 72°F 1974 | 32°F 1972 | 43% | 0% |
| Sep 2 | 59°F | 43°F | 68°F 1979 | 28°F 1972 | 43% | 0% |
| Sep 3 | 59°F | 43°F | 68°F 1977 | 23°F 1980 | 43% | 0% |
| Sep 4 | 59°F | 43°F | 69°F 1977 | 27°F 1980 | 43% | 0% |
| Sep 5 | 58°F | 42°F | 70°F 1974 | 26°F 1980 | 43% | 0% |
| Sep 6 | 58°F | 42°F | 70°F 1974 | 22°F 1996 | 42% | 0% |
| Sep 7 | 58°F | 42°F | 69°F 1974 | 30°F 1983 | 42% | 0% |
| Sep 8 | 57°F | 42°F | 70°F 1974 | 31°F 1975 | 42% | 0% |
| Sep 9 | 57°F | 41°F | 71°F 1974 | 31°F 1973 | 41% | 0% |
| Sep 10 | 57°F | 41°F | 67°F 1979 | 29°F 1971 | 41% | 0% |
| Sep 11 | 56°F | 41°F | 67°F 1979 | 21°F 1992 | 41% | 0% |
| Sep 12 | 56°F | 41°F | 71°F 1979 | 21°F 1992 | 40% | 0% |
| Sep 13 | 56°F | 40°F | 64°F 1978 | 31°F 1971 | 40% | 0% |
| Sep 14 | 55°F | 40°F | 63°F 1997 | 26°F 1987 | 40% | 0% |
| Sep 15 | 55°F | 40°F | 64°F 1982 | 24°F 1992 | 40% | 0% |
| Sep 16 | 55°F | 39°F | 67°F 1971 | 21°F 1972 | 39% | 0% |
| Sep 17 | 54°F | 39°F | 64°F 1981 | 18°F 1972 | 39% | 1% |
| Sep 18 | 54°F | 39°F | 64°F 1995 | 24°F 1972 | 39% | 1% |
| Sep 19 | 53°F | 39°F | 64°F 1973 | 19°F 1972 | 38% | 1% |
| Sep 20 | 53°F | 38°F | 63°F 1995 | 24°F 1977 | 38% | 1% |
| Sep 21 | 53°F | 38°F | 63°F 1974 | 26°F 1992 | 38% | 1% |
| Sep 22 | 52°F | 38°F | 63°F 1974 | 17°F 1992 | 37% | 1% |
| Sep 23 | 52°F | 38°F | 65°F 1995 | 21°F 1992 | 37% | 1% |
| Sep 24 | 52°F | 37°F | 64°F 1975 | 22°F 1992 | 37% | 1% |
| Sep 25 | 51°F | 37°F | 65°F 1976 | 22°F 2004 | 36% | 2% |
| Sep 26 | 51°F | 37°F | 65°F 1995 | 19°F 1992 | 36% | 2% |
| Sep 27 | 51°F | 36°F | 65°F 1995 | 21°F 1981 | 36% | 2% |
| Sep 28 | 50°F | 36°F | 62°F 1975 | 25°F 2004 | 35% | 2% |
| Sep 29 | 50°F | 36°F | 59°F 1975 | 20°F 1992 | 35% | 3% |
| Sep 30 | 49°F | 35°F | 64°F 2003 | 22°F 1974 | 34% | 3% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (AKDT).
- September 1
- sunrise 6:49 AM, sunset 9:04 PM
- September 30
- sunrise 8:03 AM, sunset 7:31 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00500302 (Anderson Lake), public domain. Records: NOAA GHCN-Daily, station USC00500302, 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.