Knoxville weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Good
Best time to visit: April – May, September – October
What is the weather like in Knoxville in August?
In August, Knoxville is hot: daytime highs average 30 °C, and even at night it stays warm at around 20 °C. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 91 mm in total. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Knoxville.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 52 | 60 | 81 |
| Day | 30° | 30° | 27° |
| Night | 21° | 20° | 17° |
| Sun | 7 h | 7 h | 6 h |
| Rain days | 15 | 12 | 8 |
More details for August
- Daylight
- 13 h 34 min06:54 – 20:28
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 22 daysdew point 18 °C or moreAll months
- Wind
- 10 km/haverage daily peakAll months
- Cloud cover
- 52 %on averageAll months
- Hot days
- 15 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 50 %65 %
- Sunshineweight 20 %67 %
- Few rainy daysweight 30 %46 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Knoxville in August: quick answers
Is Knoxville hot in August?
Yes. In August, Knoxville is hot: daytime highs average 30 °C and nights stay around 20 °C. On about 15 days the thermometer climbs to 30 °C or more.
Does it rain much in Knoxville in August?
Rain is frequent, with about 12 rainy days and 91 mm in total.
Knoxville month by month
The whole year in KnoxvilleAll destinations: USAWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences