Clarksville weather in September: Clarksville, Tennessee: normal highs, lows, rain and records for September
Clarksville in September has a normal high of 82°F and a normal low of 59°F, a daily mean of 71°F, falling from 87°F on the 1st to 78°F by the 30th. Measurable precipitation falls on 9 days in a normal September, 3.47 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 15°C, 88 mm of precipitation in September.
- NOAA stationClarksville Outlaw Airport
- Station IDUSW00003894
- Location36.62°N 87.42°W
- Elevation560 ft (171 m)
- Population185,690
- Jan 46° 28°
- Feb 51° 31°
- Mar 60° 38°
- Apr 70° 47°
- May 78° 57°
- Jun 86° 64°
- Jul 89° 68°
- Aug 89° 66°
- Sep 82° 59°
- Oct 72° 47°
- Nov 59° 37°
- Dec 49° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Clarksville in September?
The normal high is 82°F and the normal low 59°F, for a daily mean of 70.6°F. September is 6.8°F cooler than August and 11.3°F warmer than October. September is the 4th warmest month of the year in Clarksville and the 10th wettest. Across the month the normal high falls 9°F, from 87°F on September 1 to 78°F on September 30. From one year to the next September's mean temperature typically moves about 2.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 68°F and 73°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 87°F | 63°F | 31% | 17% |
| September 8 | 85°F | 61°F | 31% | 17% |
| September 15 | 83°F | 59°F | 31% | 17% |
| September 22 | 80°F | 57°F | 32% | 17% |
| September 30 | 78°F | 53°F | 32% | 18% |
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 | 87°F | 63°F | 31% | 17% | 13 h |
| September 2 | 87°F | 63°F | 31% | 17% | 13 h |
| September 3 | 86°F | 63°F | 31% | 17% | 13 h |
| September 4 | 86°F | 63°F | 31% | 17% | 12 h 50 min |
| September 5 | 86°F | 62°F | 31% | 17% | 12 h 50 min |
| September 6 | 85°F | 62°F | 31% | 17% | 12 h 50 min |
| September 7 | 85°F | 62°F | 31% | 17% | 12 h 50 min |
| September 8 | 85°F | 61°F | 31% | 17% | 12 h 40 min |
| September 9 | 85°F | 61°F | 31% | 17% | 12 h 40 min |
| September 10 | 84°F | 61°F | 31% | 17% | 12 h 40 min |
| September 11 | 84°F | 60°F | 31% | 17% | 12 h 40 min |
| September 12 | 84°F | 60°F | 31% | 17% | 12 h 40 min |
| September 13 | 83°F | 60°F | 31% | 17% | 12 h 30 min |
| September 14 | 83°F | 59°F | 31% | 17% | 12 h 30 min |
| September 15 | 83°F | 59°F | 31% | 17% | 12 h 30 min |
| September 16 | 82°F | 59°F | 31% | 17% | 12 h 30 min |
| September 17 | 82°F | 58°F | 31% | 17% | 12 h 20 min |
| September 18 | 82°F | 58°F | 31% | 17% | 12 h 20 min |
| September 19 | 81°F | 58°F | 32% | 17% | 12 h 20 min |
| September 20 | 81°F | 57°F | 32% | 17% | 12 h 20 min |
| September 21 | 81°F | 57°F | 32% | 17% | 12 h 10 min |
| September 22 | 80°F | 57°F | 32% | 17% | 12 h 10 min |
| September 23 | 80°F | 56°F | 32% | 17% | 12 h 10 min |
| September 24 | 80°F | 56°F | 32% | 18% | 12 h 10 min |
| September 25 | 79°F | 55°F | 32% | 18% | 12 h 10 min |
| September 26 | 79°F | 55°F | 32% | 18% | 12 h |
| September 27 | 79°F | 55°F | 32% | 18% | 12 h |
| September 28 | 78°F | 54°F | 32% | 18% | 12 h |
| September 29 | 78°F | 54°F | 32% | 18% | 12 h |
| September 30 | 78°F | 53°F | 32% | 18% | 11 h 50 min |
- Normal high
- 82°FSeptember average
- Normal low
- 59°FSeptember average
- Precipitation
- 3.47 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 6
- 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
- 21
- Sunshine
- 80%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003894; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Clarksville in September?
On a given September day the chance of 0.01 inch or more is 31% on average, highest around September 30 (32%). In all, 3.47 in falls on 9 days of a normal September, 1 of them with an inch or more.
In a normal September in Clarksville, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003894.
What are the records for September in Clarksville?
The September mean against the 1991-2020 normal of 70.6°F: 2021 69.8°F (−0.8), 2022 71.5°F (+0.9), 2023 73.0°F (+2.4), 2025 74.3°F (+3.7), 2026 80.1°F (+9.5). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.8°F | −0.8°F | 2.70 in |
| 2022 | 71.5°F | +0.9°F | 2.13 in |
| 2023 | 73.0°F | +2.4°F | 3.94 in |
| 2025 | 74.3°F | +3.7°F | 1.09 in |
| 2026 | 80.1°F | +9.5°F | 0.20 in |
Source: recent months: ACIS, station USW00003894. Records and recent months use complete months only.
How does September in Clarksville 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; Clarksville's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Clarksville in August89°F by day, 66°F at night
- Clarksville in October72°F by day, 47°F at night
- Clarksville through the yearEvery month, frost dates, records and recent years
- Tennessee in SeptemberThe statewide normal and the warmest and coolest places
- Memphis: Tennessee's warmest Septembernormal high 86°F