Clarksville, TN weather in September
In September, Clarksville sees highs around 84°F and lows around 60°F: warm and often humid, with some rain. Rain falls on about 9 days.
- Normal high
- 84°F
- Normal low
- 60°F
- Wet days
- 9
- 3.4 in total
- Muggy days
- 11
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 88°F | 79°F |
| Normal low | 65°F | 54°F |
| Chance of a wet day | 30% | 28% |
| Sunrise / sunset | 6:20 am / 7:18 pm | 6:43 am / 6:34 pm |
| Daylight | 12.9 h | 11.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical September day
- 6 am62°Fdew point 60°F
- 9 am73°Fdew point 62°F
- Noon80°Fdew point 61°F
- 3 pm81°Fdew point 60°F
- 6 pm75°Fdew point 61°F
- 9 pm69°Fdew point 61°F
NOAA hourly normals (local standard time) from Ft Campbell AAF (12 mi away); average wind 5 mph; clear or few clouds in 53% of daytime hours, mostly cloudy or overcast in 34%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F7 of 30
- Hot dayshigh 90°F or more7 of 30
- Muggy daysdaily mean dew point 65°F or more11 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.4 in; a dry September brings about 1.4 in and a wet one about 4.4 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 92°F
- Coolest September2011: average high 78°F
- Wettest September2002: 9.9 in
- Driest September2019: 0.2 in
- Highest reading101°F (September 4, 1999)
- Lowest reading39°F (September 24, 2012)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 90°F | 84°F | 72°F |
| Normal low | 67°F | 60°F | 48°F |
| Wet days | 9 | 9 | 9 |
| Comfortable days | 1 | 7 | 15 |
| Daylight | 13.5 h | 12.4 h | 11.3 h |
Highs change by -6°F from August and -12°F into October.
Nearby alternatives in September
- Cooler: Gatlinburg, TN222 mi · high 78°F · 11 wet days
How Clarksville ranks in September
- Normal high157th warmest of 378 cities; 5th of 7 in Tennessee
- Wet days217th driest of 378
- Comfortable days186th most of 342
What to pack for Clarksville in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 21 heating degree days and 222 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Clarksville in September?
The normal high is 84°F and the normal low is 60°F. From 1991 to 2020 the hottest September reading was 101°F (September 4, 1999).
Does it rain a lot in Clarksville in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 3.4 in. The wettest September in 1991-2020 was in 2002 (9.9 in); the driest was in 2019 (0.2 in).
Is September a good time to visit Clarksville?
September ranks 6th of 12 months on our comfort score for Clarksville (53 out of 100). It has about 7 comfortable days and about 7 days at 90°F or hotter. The best months are April and October.
Where the numbers come from
- Temperature, rain, snowfall and frost dates: Clarksville Wwtp (USC00401790), 1.8 mi NE of the city center, 402 ft (72 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Snow depth: Cheatham L&D (USC00401663), 16 mi SSE of the city center, 392 ft (82 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Ft Campbell AAF (USW00013806), 12 mi NW of the city center, 568 ft (94 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Campbell AAF Airport (746710-13806), 12 mi NW of the city center, 573 ft (99 ft higher than the city). Hourly observations, 1991-2020.