nomadseason

September Weather in Clarksville, United States

Last updated: June 24, 2025

In Clarksville, United States, the average temperature in September hovers around 23°C (74°F), offering a pleasant climate. However, be prepared for a range of temperatures, with minimums dipping to 8°C (47°F) and maximums soaring to 37°C (99°F). This month also brings about 120 mm (4.7 in) of precipitation, spread over 8 days. With an average humidity level of 71%, it's a humid yet vibrant time to experience what Clarksville has to offer!

September Temperature in Clarksville

In September in Clarksville, the average temperature is 23°C (74°F), with maximums reaching 37°C (99°F) and minimums dropping as low as 8°C (47°F). This makes it an ideal time to pack both light clothing for the warm days and a jacket for the cooler evenings, ensuring a comfortable and enjoyable trip.

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 37°C (99°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec394352587077807873624844
Data source: Temperature data for Clarksville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 120 mm (4.7 in) over the course of 8 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 120 mm (4.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec9717115115712811211212212012985130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Clarksville

In Clarksville in September, humidity is 71%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping embrace that can make outdoor activities feel sticky, but if you're well-hydrated and take breaks in the shade, it offers a pleasant tropical ambiance perfect for exploration.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather4°C (40°F)97 mm (3.8 inches)87%moderate
February Weather6°C (44°F)171 mm (6.7 inches)86%high
March Weather11°C (52°F)151 mm (6.0 inches)86%high
April Weather15°C (59°F)157 mm (6.2 inches)82%very high
May Weather21°C (70°F)128 mm (5.0 inches)82%very high
June Weather25°C (77°F)112 mm (4.4 inches)83%extreme
July Weather27°C (81°F)112 mm (4.4 inches)80%extreme
August Weather25°C (78°F)122 mm (4.8 inches)74%very high
September Weather23°C (74°F)120 mm (4.7 inches)71%very high
October Weather17°C (63°F)129 mm (5.1 inches)78%high
November Weather9°C (48°F)85 mm (3.4 inches)88%moderate
December Weather7°C (45°F)130 mm (5.1 inches)88%moderate

Compare Clarksville's Climate with Cities Worldwide