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August Weather in Knoxville, United States

Last updated: June 24, 2025

In Knoxville, United States, the average temperature in August hovers around 24°C (75°F), making it a comfortable time to visit. However, be prepared for a range of temperatures; the minimum can drop to 11°C (52°F), while the maximum can soar up to 37°C (99°F). During this month, expect about 71 mm (2.8 in) of precipitation over 8 days, with an average humidity of 77%.

August Temperature in Knoxville

In August in Knoxville, the average temperature is 24°C (75°F). Maximum temperatures can reach 37°C (99°F), while minimums can drop as low as 11°C (52°F). This range offers a pleasant climate for travelers seeking warmth with mild evenings.

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 24°C (75°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec232541506375787569543932
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 71 mm (2.8 in) over the course of 8 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 71 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4447867115312977711211305038
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 77%. With an average temperature of 24°C (75°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling and may require frequent breaks to stay hydrated while exploring.

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 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111198643
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 Weather-5°C (24°F)44 mm (1.7 inches)78%moderate
February Weather-4°C (25°F)47 mm (1.8 inches)80%moderate
March Weather5°C (41°F)86 mm (3.4 inches)77%high
April Weather10°C (50°F)71 mm (2.8 inches)77%very high
May Weather17°C (63°F)153 mm (6.0 inches)77%very high
June Weather24°C (75°F)129 mm (5.1 inches)81%extreme
July Weather25°C (78°F)77 mm (3.0 inches)81%extreme
August Weather24°C (75°F)71 mm (2.8 inches)77%very high
September Weather21°C (69°F)121 mm (4.8 inches)73%very high
October Weather12°C (54°F)130 mm (5.1 inches)75%high
November Weather4°C (40°F)50 mm (2.0 inches)85%moderate
December Weather0°C (32°F)37 mm (1.5 inches)83%moderate

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