Chattanooga Weather in September
Average highs run from 81°F on September 1 to 73°F on September 30, and lows from 65°F to 57°F. Normal precipitation for the month is 4.92 in over about 8 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
- 78°F
- Average low
- 61°F
- Precipitation
- 4.92 in
- Record high
- 103°FSep 13, 2019
- Record low
- 36°FSep 30, 1967
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.5
- Daylight
- 12 h 54 min to 11 h 51 min
- Cloud cover
- 50%
- Humidity
- 69%
- Dew point
- 59°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 | 81°F | 65°F | 100°F 1951 | 49°F 1946 | 28% | 0% |
| Sep 2 | 81°F | 65°F | 100°F 2011 | 53°F 1954 | 28% | 0% |
| Sep 3 | 81°F | 65°F | 100°F 1954 | 51°F 1952 | 28% | 0% |
| Sep 4 | 81°F | 65°F | 102°F 1954 | 51°F 1952 | 28% | 0% |
| Sep 5 | 80°F | 64°F | 102°F 1954 | 52°F 1952 | 28% | 0% |
| Sep 6 | 80°F | 64°F | 101°F 1954 | 53°F 1984 | 27% | 0% |
| Sep 7 | 80°F | 64°F | 100°F 1954 | 51°F 2017 | 27% | 0% |
| Sep 8 | 80°F | 64°F | 99°F 1938 | 52°F 1953 | 27% | 0% |
| Sep 9 | 80°F | 63°F | 99°F 1939 | 49°F 1944 | 27% | 0% |
| Sep 10 | 79°F | 63°F | 98°F 2019 | 50°F 1956 | 27% | 0% |
| Sep 11 | 79°F | 63°F | 97°F 2026 | 46°F 1940 | 27% | 0% |
| Sep 12 | 79°F | 63°F | 98°F 2019 | 40°F 1940 | 27% | 0% |
| Sep 13 | 79°F | 62°F | 103°F 2019 | 41°F 1940 | 27% | 0% |
| Sep 14 | 78°F | 62°F | 98°F 1939 | 42°F 1953 | 27% | 0% |
| Sep 15 | 78°F | 62°F | 97°F 1991 | 46°F 1985 | 27% | 0% |
| Sep 16 | 78°F | 61°F | 98°F 2019 | 50°F 1961 | 27% | 0% |
| Sep 17 | 78°F | 61°F | 100°F 2019 | 49°F 1984 | 27% | 0% |
| Sep 18 | 77°F | 61°F | 96°F 1954 | 47°F 1981 | 27% | 0% |
| Sep 19 | 77°F | 61°F | 96°F 2010 | 42°F 1981 | 27% | 0% |
| Sep 20 | 77°F | 60°F | 96°F 2010 | 45°F 1981 | 27% | 0% |
| Sep 21 | 76°F | 60°F | 98°F 1955 | 44°F 1956 | 27% | 0% |
| Sep 22 | 76°F | 59°F | 96°F 1940 | 40°F 1938 | 27% | 0% |
| Sep 23 | 76°F | 59°F | 96°F 2024 | 40°F 1982 | 27% | 0% |
| Sep 24 | 75°F | 59°F | 94°F 2010 | 41°F 1963 | 27% | 0% |
| Sep 25 | 75°F | 58°F | 97°F 2016 | 42°F 1943 | 27% | 0% |
| Sep 26 | 75°F | 58°F | 96°F 2019 | 42°F 1940 | 27% | 0% |
| Sep 27 | 74°F | 58°F | 95°F 2019 | 38°F 1940 | 27% | 0% |
| Sep 28 | 74°F | 57°F | 94°F 1954 | 39°F 1940 | 27% | 0% |
| Sep 29 | 74°F | 57°F | 95°F 2019 | 37°F 1942 | 27% | 0% |
| Sep 30 | 73°F | 57°F | 97°F 2019 | 36°F 1967 | 27% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- September 1
- sunrise 7:14 AM, sunset 8:08 PM
- September 30
- sunrise 7:35 AM, sunset 7:26 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00405431 (Lookout Mtn-Point Park), public domain. Records: NOAA GHCN-Daily, station USW00013882, 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.