Lebanon weather in September: Lebanon, Tennessee: normal highs, lows, rain and records for September
Lebanon in September has a normal high of 84°F and a normal low of 60°F, a daily mean of 72°F, falling from 88°F on the 1st to 79°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 3.85 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 15°C, 98 mm of precipitation in September.
- NOAA stationLebanon
- Station IDUSC00405108
- Location36.23°N 86.32°W
- Elevation525 ft (160 m)
- Population51,501
- Jan 47° 28°
- Feb 52° 30°
- Mar 61° 38°
- Apr 71° 46°
- May 79° 56°
- Jun 87° 65°
- Jul 90° 69°
- Aug 90° 67°
- Sep 84° 60°
- Oct 73° 47°
- Nov 61° 37°
- Dec 51° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lebanon in September?
The normal high is 84°F and the normal low 60°F, for a daily mean of 71.6°F. September is 6.6°F cooler than August and 11.9°F warmer than October. September is the 4th warmest month of the year in Lebanon and the 10th wettest. Across the month the normal high falls 9°F, from 88°F on September 1 to 79°F on September 30. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 69°F and 74°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 25%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 88°F | 64°F | 25% | 18% |
| September 8 | 86°F | 63°F | 24% | 17% |
| September 15 | 84°F | 60°F | 24% | 17% |
| September 22 | 82°F | 57°F | 25% | 17% |
| September 30 | 79°F | 54°F | 25% | 17% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 88°F | 64°F | 25% | 18% | 13 h |
| September 2 | 87°F | 64°F | 25% | 18% | 13 h |
| September 3 | 87°F | 64°F | 25% | 18% | 12 h 50 min |
| September 4 | 87°F | 64°F | 25% | 17% | 12 h 50 min |
| September 5 | 87°F | 63°F | 25% | 17% | 12 h 50 min |
| September 6 | 86°F | 63°F | 24% | 17% | 12 h 50 min |
| September 7 | 86°F | 63°F | 24% | 17% | 12 h 50 min |
| September 8 | 86°F | 63°F | 24% | 17% | 12 h 40 min |
| September 9 | 86°F | 62°F | 24% | 17% | 12 h 40 min |
| September 10 | 85°F | 62°F | 24% | 17% | 12 h 40 min |
| September 11 | 85°F | 62°F | 24% | 17% | 12 h 40 min |
| September 12 | 85°F | 61°F | 24% | 17% | 12 h 30 min |
| September 13 | 85°F | 61°F | 24% | 17% | 12 h 30 min |
| September 14 | 84°F | 61°F | 24% | 17% | 12 h 30 min |
| September 15 | 84°F | 60°F | 24% | 17% | 12 h 30 min |
| September 16 | 84°F | 60°F | 24% | 17% | 12 h 30 min |
| September 17 | 83°F | 59°F | 24% | 17% | 12 h 20 min |
| September 18 | 83°F | 59°F | 24% | 17% | 12 h 20 min |
| September 19 | 83°F | 59°F | 24% | 17% | 12 h 20 min |
| September 20 | 82°F | 58°F | 25% | 17% | 12 h 20 min |
| September 21 | 82°F | 58°F | 25% | 17% | 12 h 10 min |
| September 22 | 82°F | 57°F | 25% | 17% | 12 h 10 min |
| September 23 | 81°F | 57°F | 25% | 17% | 12 h 10 min |
| September 24 | 81°F | 56°F | 25% | 17% | 12 h 10 min |
| September 25 | 81°F | 56°F | 25% | 17% | 12 h 10 min |
| September 26 | 80°F | 56°F | 25% | 17% | 12 h |
| September 27 | 80°F | 55°F | 25% | 17% | 12 h |
| September 28 | 80°F | 55°F | 25% | 17% | 12 h |
| September 29 | 79°F | 54°F | 25% | 17% | 12 h |
| September 30 | 79°F | 54°F | 25% | 17% | 11 h 50 min |
- Normal high
- 84°FSeptember average
- Normal low
- 60°FSeptember average
- Precipitation
- 3.85 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 22
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00405108; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lebanon in September?
On a given September day the chance of 0.01 inch or more is 25% on average, highest around September 1 (25%). In all, 3.85 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Lebanon, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00405108.
What are the records for September in Lebanon?
The warmest September temperature on this station's record (since 1902) is 109°F, on September 7, 1925; the coldest is 33°F, on September 24, 1983. The wettest September brought 12.17 in (1979).
The September mean against the 1991-2020 normal of 71.6°F: 2024 73.1°F (+1.5), 2025 73.3°F (+1.7), 2026 79.3°F (+7.7). 3 of 3 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2024 | 73.1°F | +1.5°F | 6.21 in |
| 2025 | 73.3°F | +1.7°F | 2.61 in |
| 2026 | 79.3°F | +7.7°F | 1.90 in |
Source: records: ACIS, station USC00405108; recent months: ACIS, station USC00405108. Records and recent months use complete months only.
How does September in Lebanon compare across Tennessee?
Across the 116 places PlainClimate covers in Tennessee, September normal highs run from 74°F in Roan Mountain to 86°F in Memphis; Lebanon's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.