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September Weather in Clarksville, United States

Last updated: June 24, 2025

In September, the average temperature in Clarksville, United States is a pleasant 23°C (74°F). However, temperatures can vary, with minimums dipping to 8°C (47°F) and maxing out at a sizzling 36°C (97°F). Expect 105 mm (4.1 in) of precipitation spread over 9 days, contributing to a cozy average humidity of 75%. Perfect for those who enjoy warm, humid climates!

September Temperature in Clarksville

In September in Clarksville, the average temperature is 23°C (74°F). The maximum can reach 36°C (97°F) and the minimum can be as low as 8°C (47°F). This makes it an ideal destination for travelers seeking warm weather, but be prepared for cooler evenings.

September Weather in Clarksville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Clarksville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clarksville, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424751616976807874645045
Data source: Temperature data for Clarksville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Clarksville

In Clarksville in September, the total precipitation amount reaches 105 mm (4.1 in) over the course of 9 days.

September Precipitation Trends in Clarksville

The chart displays monthly precipitation patterns in Clarksville, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Clarksville, September typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec82111851111181171021371051017799
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Clarksville

In Clarksville in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Clarksville

This chart illustrates the average monthly humidity levels in Clarksville, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Clarksville is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Clarksville

In Clarksville in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Clarksville.

Maximum UV Index Levels in Clarksville for September

The chart shows the monthly maximum UV Index (UVI) for Clarksville in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Clarksville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109853
Data source: Clarksville September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Clarksville Compares to Other Months

Weather in Clarksville varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Clarksville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Clarksville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)82 mm (3.2 inches)84%moderate
February Weather8°C (47°F)111 mm (4.4 inches)84%high
March Weather11°C (52°F)85 mm (3.4 inches)84%high
April Weather16°C (61°F)111 mm (4.4 inches)82%very high
May Weather21°C (70°F)118 mm (4.7 inches)82%extreme
June Weather24°C (76°F)117 mm (4.6 inches)83%extreme
July Weather27°C (80°F)102 mm (4.0 inches)79%extreme
August Weather26°C (78°F)137 mm (5.4 inches)77%very high
September Weather23°C (74°F)105 mm (4.1 inches)75%very high
October Weather18°C (65°F)101 mm (4.0 inches)81%very high
November Weather10°C (50°F)77 mm (3.0 inches)87%moderate
December Weather7°C (46°F)99 mm (3.9 inches)85%moderate

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