Summer temperatures · Tennessee
How hot does Knoxville get in summer?
In a typical summer, June to August, Knoxville averages highs around 87°F and lows around 67°F.
About 37 days a year reach 90°F or hotter, and a day at 100°F comes along less than once a year. About 135 days a year get to 80°F or warmer. That makes it the 48th hottest summer of the 129 US cities we track.
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The hottest high in the forecast for the next 48 hours is about 54°F.
Knoxville clears 80°F on about 135 days a year, so the Smokies on the horizon look cooler than they have any right to.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 87°F |
|---|---|
| Average summer low | 67°F |
| Days a year at 80°F or warmer | 135 |
| Days a year at 90°F or hotter | 37 |
| Days a year at 100°F or hotter | fewer than one |
| Average winter high, for comparison | 51°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Greensboro, North Carolina: highs around 87°F, lows around 68°F
- Albuquerque, New Mexico: highs around 90°F, lows around 64°F
- Salt Lake City, Utah: highs around 90°F, lows around 65°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00013891.