September Weather in Sevierville, United States

Last updated: February 24, 2025

In September, Sevierville, United States experiences a delightful blend of warm and cool weather, with maximum temperatures reaching 33°C (91°F) and an average of 21°C (70°F). As summer gives way to autumn, nights can be refreshing, dipping down to a minimum of 6°C (43°F). The month also brings 106 mm (4.2 in) of rainfall across 12 days, contributing to a humid atmosphere with an average humidity of 76%. This combination of heat and occasional rain creates an invigorating environment, perfect for outdoor adventures and enjoying the vibrant fall foliage.

September Temperature in Sevierville

In Sevierville, Tennessee, September marks the transition from the sweltering summer to the mild embrace of fall. With minimum temperatures averaging around 6°C (43°F), the month begins to cool, offering a refreshing change from the summer heat. The average temperature climbs to a comfortable 21°C (70°F), while daytime highs can reach up to a steamy 33°C (91°F), making it one of the warmer months of the year. As the days grow shorter and the leaves begin to hint at autumn colors, this time of year is ideal for outdoor adventures, allowing visitors to enjoy the lingering warmth before the cooler months unfold. The seasonal shift is palpable, hinting at the cozy fall days that follow.

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

The chart illustrates September temperature patterns in Sevierville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394549566571757370604642
Data source: Temperature data for Sevierville 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 Sevierville

In September, Sevierville experiences a moderate average precipitation of 106 mm (4.2 in) over about 12 days, signaling a transition toward the drier autumn months. This marks a slight decrease from the wetter summer months, particularly August, which received 129 mm (5.1 in). As the year progresses, precipitation levels generally decline, with September showing a reduction in both rainfall and rainy days compared to the peak summer months. This trend continues into October, where average precipitation rises slightly again to 132 mm (5.2 in), but with fewer rainy days, suggesting a more variable weather pattern as autumn sets in. The shift in precipitation patterns plays a crucial role in the region’s lush landscapes, setting the stage for the beautiful fall foliage to come.

September Precipitation Trends in Sevierville

The chart displays monthly precipitation patterns in Sevierville, 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.
JanFebMarAprMayJunJulAugSepOctNovDec9715314513813111111812910613282136
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sevierville

In Sevierville, United States, September marks a shift in humidity levels, dropping to a comfortable 76%. This change reflects a trend of decreasing humidity as the summer heat wanes, following a peak in August. Prior months, notably from January to July, consistently showed higher humidity levels, hovering around 83-86%. This gradual decline from the summer's peak culminates in a more moderate fall climate, creating a pleasant atmosphere for outdoor activities. Notably, humidity levels begin to rise again in October, signaling the return of the wetter season as the area approaches winter. Overall, September offers a refreshing respite before humidity begins its ascent once more.

September Average Humidity in Sevierville

This chart illustrates the average monthly humidity levels in Sevierville, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sevierville

As September rolls in, Sevierville experiences a very high UV Index of 9, making sun safety paramount as burn times decrease to just 15 minutes. This month reflects a slight dip from the extreme levels seen during the summer, yet it remains crucial to stay vigilant with sun protection, especially following an intense season. The UV Index trend from January through August underscores the increasing intensity of solar radiation, peaking in May through July. As summer transitions into fall, the gradually decreasing UV levels signal a shift, but maintaining sun precautions is still essential. For detailed information about the UV Index in Sevierville, visit Sevierville UV Index.

Maximum UV Index Levels in Sevierville for September

The chart shows the monthly maximum UV Index (UVI) for Sevierville 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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109864
Data source: Sevierville 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.

September Sunshine in Sevierville

As the summer sun begins to wane, September in Sevierville offers a delightful 285 hours of sunshine, making it a perfect transition month into autumn. This is a slight dip from the peak summer months of June and July, which boast an impressive 310 and 327 hours of sunshine, respectively. However, September's hours still reflect a strong luminosity compared to the earlier part of the year, with bright rays that linger longer than in October and November. As the vibrant hues of fall start to appear, residents and visitors alike can enjoy the comfortable warmth and the gentle embrace of sunny days, ensuring that September remains a cherished month for outdoor activities and scenic explorations.

Monthly Sunshine Duration in Sevierville: September Highlighted

The September sunshine duration represents the total number of hours Sevierville experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec149h160h227h262h298h310h327h310h285h260h226h171h
Data source: Sevierville September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sevierville During September

In Sevierville, United States, September offers a delightful balance of warmth and sunshine, boasting a 52% chance of sunny weather. As summer transitions to fall, this month stands out with a higher likelihood of sunshine compared to the peak summer months of July (41%) and August (39%). Notably, September's sunny disposition rivals that of April (53%) and surpasses October (41%) and November (51%). This trend suggests that while summer fun may be waning, September remains a prime time for outdoor activities under clear, blue skies. As the heat eases, the pleasant weather makes it an inviting month for exploration and enjoyment in the beautiful Smoky Mountains.

Percentage of Sunny Days in September in Sevierville

The chart illustrates the percentage of sunny days in Sevierville throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sevierville experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%34%39%53%29%35%41%39%52%41%51%42%
Data source: Sevierville September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sevierville in September

As September rolls into Sevierville, the transition from summer to fall becomes evident in the diminishing daylight. This month offers an average of 12 hours of daylight, a decrease from 13 hours in August, marking a gentle tapering as the days begin to shorten. Following the bright, long days of June and July, which both basked in 14 hours of sunshine, September acts as a bridge to the cooler months ahead. The shift reflects nature's rhythm—after enjoying the peak warmth of summer, residents now embrace shorter days that evoke the cozy charm of autumn. With October looming, daylight will continue to dwindle, reminding us of the cyclical beauty of the seasons.

Average Daylight Hours in Sevierville for September

The chart illustrates the variation in daylight duration in Sevierville throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 2m10h 53m11h 59m13h 6m14h 3m14h 31m14h 16m13h 25m12h 21m11h 13m10h 15m9h 46m
Data source: Sevierville daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Sevierville

As September arrives in Sevierville, the breezes begin to soften, with average wind speeds dipping to 1.5 m/s (3 mph). This slight reduction continues a trend observed through the summer months, where winds gradually eased from a seasonal high of 2.3 m/s (5 mph) in the spring to calmer conditions. The gentle winds of September create a tranquil atmosphere, signaling a transition into the autumn season. As the temperatures cool and the leaves start to change, this mellow wind invites residents and visitors alike to enjoy the serene beauty of the Smoky Mountains during this picturesque time of year.

Average September Wind Speed in Sevierville

The chart displays monthly wind speed patterns in Sevierville, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.22.32.32.01.71.61.31.5 m/s1.82.02.4
Data source: Sevierville September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Sevierville Compares to Other Months

The weather in Sevierville changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Sevierville and find detailed weather information for every month.

September and January present starkly contrasting weather patterns. September typically enjoys milder temperatures, with averages reaching 21°C (70°F) and maximums climbing to 33°C (91°F), while nights cool to around 6°C (43°F). This month also sees significant humidity at 76% and about 106 mm (4.2 in) of rainfall over roughly 12 days. In contrast, January is marked by much colder conditions, with average temperatures dropping to 4°C (39°F) and nighttime lows plummeting to -17°C (1°F). Precipitation remains slightly lower at 97 mm (3.8 in) across 13 days, but the humidity is higher at 86%. For those interested in a deeper dive into January weather, you can visit Sevierville weather in January.

September and February present a stark contrast in weather characteristics. September boasts a comfortable average temperature of 21°C (70°F), with highs reaching up to 33°C (91°F), while February struggles to get beyond an average of 7°C (45°F), with maximum temperatures only reaching 25°C (77°F). Precipitation is relatively lower in September at 106 mm (4.2 in) over 12 days, compared to February's 153 mm (6.0 in) across 14 days, indicating a wetter winter month. Additionally, humidity levels are higher in February at 86%, compared to 76% in September, adding to the chill in the air. For more detailed information, check out Sevierville weather in February.

September and March present contrasting weather patterns. In September, temperatures range from a mild 6°C (43°F) to a warm 33°C (91°F), with an average of 21°C (70°F), making it a generally pleasant month for outdoor activities. However, it experiences significant humidity at 76% and roughly 106 mm (4.2 in) of precipitation over about 12 days.

In contrast, March is marked by cooler temperatures, starting as low as -17°C (1°F) and peaking at 28°C (82°F), with an average of 10°C (50°F). This month receives more precipitation, totaling 145 mm (5.7 in) across approximately 15 days, and higher humidity at 86%. For a deeper dive into March weather specifics, you can check Sevierville weather in March.

In comparing the weather of September and April, we see notable differences in temperature and precipitation patterns. September enjoys warmer temperatures, with an average of 21°C (70°F) and maximum highs reaching up to 33°C (91°F), while April is cooler, averaging 13°C (57°F) and peaking at 30°C (85°F). April experiences more precipitation overall, totaling 138 mm (5.4 in) with similar rain days as September, which has 106 mm (4.2 in). Additionally, humidity levels are slightly higher in April at 82%, compared to 76% in September. For more detailed insights into April weather, you can check Sevierville weather in April.

September and May present distinct weather patterns. In September, temperatures range from a cool 6°C (43°F) at night to a warm 33°C (91°F) during the day, with an average of 21°C (70°F). The month sees about 106 mm (4.2 in) of precipitation over 12 days, accompanied by a humidity level of 76%. Conversely, May offers milder conditions with minimum temperatures around 0°C (32°F) and highs reaching 30°C (87°F), averaging 18°C (66°F). Precipitation is slightly higher at 131 mm (5.2 in) spread over 14 days, resulting in a higher humidity of 85%. For a closer look at weather specifics, visit Sevierville weather in May.

In comparing the weather of September and June, both months offer mild temperatures but with slight variations. September sees a range from a minimum of 6°C (43°F) to a maximum of 33°C (91°F), while June's temperatures are a bit warmer, starting from 8°C (46°F) and peaking at 31°C (88°F). Rainfall is slightly lower in September, with 106 mm (4.2 in) recorded over 12 days, compared to June's 111 mm (4.4 in) on 15 days. Humidity levels also differ, with September experiencing 76% humidity and June being a bit more humid at 85%. For more detailed insights, check out Sevierville weather in June.

In comparing the weather of September and July, September offers a broader temperature range, with minimums dipping to 6°C (43°F) and maximums reaching up to 33°C (91°F). In contrast, July features higher minimum temperatures around 13°C (56°F) and a more consistent daily average of 24°C (75°F). Precipitation is slightly higher in July, totaling 118 mm (4.6 in) spread over 16 days, compared to September's 106 mm (4.2 in) over 12 days. Additionally, humidity levels are slightly lower in September at 76%, whereas July experiences a higher humidity of 83%. For a more detailed look at July weather, you can refer to Sevierville weather in July.

In September, temperatures range from a cool minimum of 6°C (43°F) to a warm maximum of 33°C (91°F), averaging around 21°C (70°F). This month experiences a bit less precipitation compared to August, with 106 mm (4.2 in) over 12 days. The humidity remains steady at 76%. In contrast, August presents milder temperatures, with a minimum of 12°C (55°F) and a maximum of 32°C (89°F), averaging 23°C (74°F). Additionally, August sees a higher rainfall of 129 mm (5.1 in) spread over 15 days. For more details, you can visit Sevierville weather in August.

In September, weather conditions are generally warmer with average temperatures around 21°C (70°F) and a maximum that can reach up to 33°C (91°F). It experiences a moderate level of precipitation, totaling 106 mm (4.2 in) over 12 days and a humidity of 76%. In contrast, October brings cooler temperatures, with a minimum dipping to -3°C (28°F) and an average of 16°C (60°F), while still allowing for maximums to reach the same high of 33°C (91°F). The month sees increased precipitation at 132 mm (5.2 in) over 11 days and slightly higher humidity at 80%. For more details on October weather, you can check Sevierville weather in October.

September experiences warmer temperatures, with minimums around 6°C (43°F) and maximums reaching up to 33°C (91°F), making it a much more temperate month compared to November. The average temperature in September is 21°C (70°F), and while it has higher precipitation levels at 106 mm (4.2 in) over 12 days, humidity sits at a comfortable 76%. In contrast, November is considerably cooler, with minimum temperatures plunging to -11°C (13°F) and an average of just 8°C (47°F). The maximum temperature is 25°C (77°F), and while the precipitation decreases slightly to 82 mm (3.2 in) over 10 days, the humidity rises to 88%, making the air feel chillier. For more details on the weather conditions in November, you can check Sevierville weather in November.

September and December present striking contrasts in weather. In September, temperatures range from a comfortable 6°C (43°F) at night to a warm average of 21°C (70°F), peaking at a sizzling 33°C (91°F) during the day, accompanied by relatively moderate humidity levels of 76%. The month experiences about 106 mm (4.2 in) of precipitation over 12 days. In contrast, December sees significantly colder conditions, with nighttime lows plummeting to -16°C (4°F) and a much lower average temperature of 6°C (43°F). Daytime highs reach a mild 22°C (72°F), but increased humidity at 88% and higher precipitation totaling 136 mm (5.4 in) across 13 days create a damp and chilly atmosphere. For a more detailed look, check out Sevierville weather in December.

Compare Sevierville's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Sevierville

As summer transitions into autumn, September in Sevierville brings a delightful shift in weather, characterized by warm days and cooler nights. Unlike the sweltering heat of July and August, average temperatures cool to a more comfortable level, making outdoor activities enjoyable. However, this month also sees an uptick in precipitation, resulting in slightly more humid conditions than the preceding months. The combination of warmer days and refreshing evenings creates a unique atmosphere, perfect for exploring the vibrant fall foliage that starts to appear. For those keen on understanding the broader seasonal variations, visit Sevierville Climate.