Knoxville weather in August 2025

Expect daytime maximum temperatures of 31°C in Knoxville, Tennessee in August and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 86 mm of rainfall in the month.

  • 31°C maximum daytime temperature in August in Knoxville31
    31°C max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in August in Knoxville9
    9 days with some rainfall
  • 18°C minimum night-time temperature in August in Knoxville18
    18°C min night temperature
  • 13 hours of daylight per day in August in Knoxville13
    13 hours of daylight per day
  • High heat & humidity in August in KnoxvilleH
    High heat & humidity
  • 86 mm monthly rainfall in August in Knoxville86
    86 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in August in Knoxville9
    9 (Very High) UV index

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The August weather guide for Tennessee (Knoxville) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Knoxville in August?

Daytime temperatures usually reach 31°C in Knoxville in August with high heat and humidity, falling to 18°C at night.

How sunny is it in Knoxville in August?

There are normally 9 hours of bright sunshine each day in Knoxville in August - that's 65% of daylight hours.

Does it rain in Knoxville in August?

There are usually 9 days with some rain in Knoxville in August and the average monthly rainfall is 86mm.

What is the chance of a hurricane in Knoxville in August?

On average less than 1 day in August in Knoxville is likely to be affected by the passage of one or more tropical storms.

Knoxville August sunrise & sunset times

Browse the sunrise and sunset times for Knoxville in August 2025. Select a month to view Knoxville sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:43 19:40
Saturday, 16th August 2025 05:55 19:24
Sunday, 31st August 2025 06:07 19:04

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