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September Weather in Sewanee, United States

Last updated: June 24, 2025

In Sewanee, United States, the average temperature in September reaches a comfortable 23°C (73°F). However, be prepared for a range of temperatures, with lows of 7°C (45°F) and peaks hitting 36°C (97°F). Expect about 107 mm (4.2 in) of precipitation spread over 10 days, and enjoy the moderate average humidity of 64%. Embrace the variety that this month has to offer!

September Temperature in Sewanee

In September in Sewanee, the average temperature is 23°C (73°F). Maximums can reach 36°C (97°F) while minimums can drop as low as 7°C (45°F). This variable climate makes Sewanee a versatile destination for travelers, so be sure to pack accordingly for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Sewanee, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sewanee, September typically has an average temperature of 23°C (73°F), with highs reaching up to 36°C (97°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653596975787773634945
Data source: Temperature data for Sewanee 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 Sewanee

In Sewanee in September, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.

September Precipitation Trends in Sewanee

The chart displays monthly precipitation patterns in Sewanee, 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 Sewanee, September typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10817919714910712712311510711372146
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sewanee

In Sewanee in September, humidity is 64%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making travel quite comfortable yet slightly sticky, urging travelers to enjoy leisurely activities early in the day or seek shade during peak hours.

September Average Humidity in Sewanee

This chart illustrates the average monthly humidity levels in Sewanee, 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 Sewanee is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sewanee

In Sewanee 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 Sewanee.

Maximum UV Index Levels in Sewanee for September

The chart shows the monthly maximum UV Index (UVI) for Sewanee 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 Sewanee typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109754
Data source: Sewanee 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 Sewanee Compares to Other Months

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

This table compares monthly weather conditions in Sewanee, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)108 mm (4.3 inches)87%moderate
February Weather8°C (47°F)178 mm (7.0 inches)87%high
March Weather12°C (53°F)197 mm (7.8 inches)85%very high
April Weather15°C (59°F)148 mm (5.8 inches)82%very high
May Weather20°C (69°F)107 mm (4.2 inches)83%extreme
June Weather24°C (75°F)127 mm (5.0 inches)82%extreme
July Weather26°C (79°F)123 mm (4.8 inches)78%extreme
August Weather25°C (77°F)115 mm (4.5 inches)67%very high
September Weather23°C (73°F)107 mm (4.2 inches)64%very high
October Weather17°C (63°F)112 mm (4.4 inches)74%high
November Weather9°C (49°F)72 mm (2.8 inches)87%moderate
December Weather7°C (46°F)146 mm (5.7 inches)88%moderate

Compare Sewanee's Climate with Cities Worldwide