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August Weather in Knoxville, United States

Last updated: June 24, 2025

The average temperature in Knoxville, United States during August is a warm 25°C (78°F). You can expect temperatures to range from a minimum of 15°C (59°F) to a maximum of 36°C (96°F). With an average precipitation of 126 mm (5.0 in) spread over 13 days, the air remains quite humid with an average humidity level of 76%.

August Temperature in Knoxville

In August in Knoxville, the average temperature is 25°C (78°F), with maximums reaching 36°C (96°F) and minimums dropping as low as 15°C (59°F). This mild climate makes it an ideal destination for travelers seeking a pleasant and enjoyable getaway.

August Weather in Knoxville: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Knoxville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Knoxville, August typically has an average temperature of 25°C (78°F), with highs reaching up to 36°C (96°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652596975797773634945
Data source: Temperature data for Knoxville 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.

August Precipitation in Knoxville

In Knoxville in August, the precipitation amount is 126 mm (5.0 in) over the course of 13 days.

August Precipitation Trends in Knoxville

The chart displays monthly precipitation patterns in Knoxville, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Knoxville, August typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec981721551321061121201269111679132
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Knoxville

In Knoxville in August humidity is 76%. With an average temperature of 25°C (78°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick, causing travelers to seek shade and refreshment more often.

August Average Humidity in Knoxville

This chart illustrates the average monthly humidity levels in Knoxville, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Knoxville 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Knoxville

In Knoxville in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Knoxville.

Maximum UV Index Levels in Knoxville for August

The chart shows the monthly maximum UV Index (UVI) for Knoxville in August, 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 August, the maximum UV index in Knoxville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Knoxville August 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 August Weather in Knoxville Compares to Other Months

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

This table compares monthly weather conditions in Knoxville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)98 mm (3.9 inches)86%moderate
February Weather8°C (46°F)172 mm (6.8 inches)86%high
March Weather11°C (52°F)155 mm (6.1 inches)86%very high
April Weather15°C (59°F)132 mm (5.2 inches)82%very high
May Weather21°C (69°F)106 mm (4.2 inches)85%extreme
June Weather24°C (75°F)112 mm (4.4 inches)85%extreme
July Weather26°C (79°F)120 mm (4.7 inches)83%extreme
August Weather25°C (78°F)126 mm (5.0 inches)76%very high
September Weather23°C (74°F)91 mm (3.6 inches)76%very high
October Weather17°C (63°F)116 mm (4.6 inches)80%high
November Weather9°C (49°F)79 mm (3.1 inches)88%moderate
December Weather7°C (45°F)132 mm (5.2 inches)88%moderate

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