Jefferson Weather in September
Average highs run from 79°F on September 1 to 71°F on September 30, and lows from 54°F to 45°F. Normal precipitation for the month is 4.35 in over about 7 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
- 75°F
- Average low
- 50°F
- Precipitation
- 4.35 in
- Record high
- 95°FSep 4, 1925
- Record low
- 26°FSep 24, 1983
- Chance of a freeze
- 19%
- Daylight
- 12 h 57 min to 11 h 51 min
- Cloud cover
- 56%
- Humidity
- 74%
- Dew point
- 55°F
- Wind
- 3.8 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 | 79°F | 54°F | 88°F 1993 | 37°F 1999 | 26% | 0% |
| Sep 2 | 79°F | 54°F | 88°F 1921 | 37°F 1999 | 26% | 0% |
| Sep 3 | 78°F | 54°F | 92°F 2026 | 37°F 1967 | 26% | 0% |
| Sep 4 | 78°F | 54°F | 95°F 1925 | 37°F 1967 | 25% | 0% |
| Sep 5 | 78°F | 53°F | 93°F 1925 | 32°F 1997 | 25% | 0% |
| Sep 6 | 78°F | 53°F | 92°F 1925 | 32°F 1997 | 25% | 0% |
| Sep 7 | 78°F | 53°F | 93°F 1925 | 34°F 1924 | 25% | 0% |
| Sep 8 | 77°F | 53°F | 91°F 1925 | 36°F 2025 | 24% | 0% |
| Sep 9 | 77°F | 52°F | 90°F 1925 | 35°F 2025 | 24% | 0% |
| Sep 10 | 77°F | 52°F | 89°F 2002 | 36°F 2025 | 24% | 0% |
| Sep 11 | 77°F | 52°F | 88°F 2002 | 33°F 1998 | 24% | 0% |
| Sep 12 | 76°F | 52°F | 88°F 2026 | 32°F 1917 | 24% | 0% |
| Sep 13 | 76°F | 51°F | 88°F 2019 | 30°F 1917 | 24% | 0% |
| Sep 14 | 76°F | 51°F | 94°F 1998 | 30°F 1985 | 24% | 0% |
| Sep 15 | 76°F | 51°F | 92°F 1927 | 32°F 1985 | 23% | 0% |
| Sep 16 | 75°F | 50°F | 93°F 1927 | 33°F 2001 | 23% | 0% |
| Sep 17 | 75°F | 50°F | 93°F 1927 | 30°F 2000 | 23% | 0% |
| Sep 18 | 75°F | 50°F | 91°F 1927 | 29°F 1943 | 23% | 0% |
| Sep 19 | 74°F | 50°F | 87°F 1925 | 33°F 1903 | 23% | 0% |
| Sep 20 | 74°F | 49°F | 91°F 1925 | 31°F 1916 | 23% | 0% |
| Sep 21 | 74°F | 49°F | 86°F 1925 | 33°F 2006 | 23% | 0% |
| Sep 22 | 73°F | 48°F | 90°F 1931 | 33°F 2006 | 23% | 0% |
| Sep 23 | 73°F | 48°F | 90°F 1931 | 27°F 1918 | 23% | 0% |
| Sep 24 | 73°F | 48°F | 88°F 1933 | 26°F 1983 | 23% | 0% |
| Sep 25 | 73°F | 47°F | 89°F 1933 | 27°F 1983 | 23% | 0% |
| Sep 26 | 72°F | 47°F | 88°F 1933 | 32°F 1943 | 23% | 0% |
| Sep 27 | 72°F | 47°F | 87°F 1998 | 26°F 1940 | 22% | 0% |
| Sep 28 | 72°F | 46°F | 86°F 1936 | 29°F 1940 | 22% | 0% |
| Sep 29 | 71°F | 46°F | 83°F 1998 | 26°F 1942 | 22% | 0% |
| Sep 30 | 71°F | 45°F | 88°F 2019 | 28°F 2001 | 22% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 6:57 AM, sunset 7:54 PM
- September 30
- sunrise 7:20 AM, sunset 7:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00314496 (Jefferson 2 E), public domain. Records: NOAA GHCN-Daily, station USC00314496, 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.