Jefferson County Weather in September
Average highs run from 89°F on September 1 to 85°F on September 30, and lows from 71°F to 64°F. Normal precipitation for the month is 6.15 in.
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
- 87°F
- Average low
- 68°F
- Precipitation
- 6.15 in
- Record high
- 102°FSep 1, 2010
- Record low
- 48°FSep 30, 2006
- Chance of a freeze
- 0%
- Days of 90°F or more
- 13.3
- Daylight
- 12 h 46 min to 11 h 53 min
- Cloud cover
- 51%
- Humidity
- 79%
- Dew point
- 69°F
- Wind
- 4.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 89°F | 71°F | 102°F 2010 | 70°F 2015 | |
| Sep 2 | 89°F | 71°F | 97°F 2014 | 64°F 2025 | |
| Sep 3 | 89°F | 71°F | 100°F 2016 | 64°F 2025 | |
| Sep 4 | 89°F | 70°F | 98°F 2007 | 65°F 2025 | |
| Sep 5 | 89°F | 70°F | 100°F 2015 | 67°F 2021 | |
| Sep 6 | 89°F | 70°F | 99°F 2013 | 66°F 2011 | |
| Sep 7 | 88°F | 70°F | 99°F 2013 | 60°F 2011 | |
| Sep 8 | 88°F | 70°F | 100°F 2019 | 55°F 2011 | |
| Sep 9 | 88°F | 70°F | 101°F 2019 | 55°F 2011 | |
| Sep 10 | 88°F | 70°F | 100°F 2010 | 56°F 2011 | |
| Sep 11 | 88°F | 69°F | 100°F 2010 | 59°F 2011 | |
| Sep 12 | 88°F | 69°F | 99°F 2010 | 59°F 2003 | |
| Sep 13 | 88°F | 69°F | 97°F 2010 | 59°F 2011 | |
| Sep 14 | 88°F | 69°F | 100°F 2010 | 53°F 2015 | |
| Sep 15 | 87°F | 69°F | 102°F 2010 | 54°F 2015 | |
| Sep 16 | 87°F | 69°F | 99°F 2013 | 57°F 2025 | |
| Sep 17 | 87°F | 68°F | 98°F 2005 | 57°F 2025 | |
| Sep 18 | 87°F | 68°F | 102°F 2019 | 57°F 2003 | |
| Sep 19 | 87°F | 68°F | 102°F 2019 | 57°F 2003 | |
| Sep 20 | 87°F | 68°F | 100°F 2005 | 59°F 2003 | |
| Sep 21 | 86°F | 67°F | 101°F 2010 | 55°F 2006 | |
| Sep 22 | 86°F | 67°F | 99°F 2010 | 54°F 2006 | |
| Sep 23 | 86°F | 67°F | 98°F 2014 | 54°F 2006 | |
| Sep 24 | 86°F | 66°F | 98°F 2016 | 57°F 2021 | |
| Sep 25 | 86°F | 66°F | 98°F 2007 | 53°F 2008 | |
| Sep 26 | 86°F | 66°F | 99°F 2019 | 51°F 2008 | |
| Sep 27 | 85°F | 65°F | 100°F 2013 | 51°F 2008 | |
| Sep 28 | 85°F | 65°F | 96°F 2011 | 50°F 2008 | |
| Sep 29 | 85°F | 65°F | 96°F 2017 | 51°F 2008 | |
| Sep 30 | 85°F | 64°F | 97°F 2017 | 48°F 2006 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 7:12 AM, sunset 7:58 PM
- September 30
- sunrise 7:29 AM, sunset 7:22 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00085880 (Monticello 10 Sw), public domain. Records: NOAA GHCN-Daily, station USC00088756, 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.