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September Weather in Oak Ridge, United States

Last updated: June 24, 2025

In September, the average temperature in Oak Ridge, United States is a comfortable 23°C (73°F). However, be prepared for a range, as temperatures can dip to a chilly 9°C (48°F) and soar up to a sizzling 36°C (97°F). Expect 99 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity of 76%.

September Temperature in Oak Ridge

In September in Oak Ridge, the average temperature is 23°C (73°F). Maximums can reach 36°C (97°F), while minimums can drop as low as 9°C (48°F). This diverse temperature range makes it essential for travelers to pack both light and warm clothing to enjoy their visit comfortably.

September Weather in Oak Ridge: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Oak Ridge, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oak Ridge, 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 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652596975787773634845
Data source: Temperature data for Oak Ridge 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 Oak Ridge

In Oak Ridge in September, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

September Precipitation Trends in Oak Ridge

The chart displays monthly precipitation patterns in Oak Ridge, 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 Oak Ridge, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1041851621431171221321409912081141
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oak Ridge

In Oak Ridge in September humidity is 76%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities feel more intense and prompting travelers to seek shade or cool breaks more frequently.

September Average Humidity in Oak Ridge

This chart illustrates the average monthly humidity levels in Oak Ridge, 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 Oak Ridge is approximately 76%, offering insight into how humid the weather typically is during this month.
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 Oak Ridge

In Oak Ridge 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 Oak Ridge.

Maximum UV Index Levels in Oak Ridge for September

The chart shows the monthly maximum UV Index (UVI) for Oak Ridge 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 Oak Ridge typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Oak Ridge 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 Oak Ridge Compares to Other Months

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

This table compares monthly weather conditions in Oak Ridge, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)104 mm (4.1 inches)86%moderate
February Weather8°C (46°F)185 mm (7.3 inches)86%high
March Weather11°C (52°F)162 mm (6.4 inches)86%very high
April Weather15°C (59°F)142 mm (5.6 inches)82%very high
May Weather20°C (69°F)117 mm (4.6 inches)85%extreme
June Weather24°C (75°F)122 mm (4.8 inches)85%extreme
July Weather26°C (79°F)132 mm (5.2 inches)83%extreme
August Weather25°C (77°F)140 mm (5.5 inches)76%very high
September Weather23°C (73°F)99 mm (3.9 inches)76%very high
October Weather17°C (63°F)120 mm (4.7 inches)80%high
November Weather9°C (49°F)81 mm (3.2 inches)88%moderate
December Weather7°C (45°F)141 mm (5.6 inches)88%moderate

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