Knoxville Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Knoxville, Tennessee during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F each month in Knoxville, scroll down farther. There are also monthly and yearly counts of days with cold weather.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 47 | 29 | January | 8 | -1 |
| 53 | 34 | February | 11 | 1 |
| 61 | 41 | March | 16 | 5 |
| 73 | 49 | April | 23 | 10 |
| 81 | 59 | May | 27 | 15 |
| 87 | 66 | June | 31 | 19 |
| 89 | 70 | July | 32 | 21 |
| 88 | 68 | August | 31 | 20 |
| 84 | 63 | September | 29 | 17 |
| 72 | 50 | October | 22 | 10 |
| 60 | 38 | November | 15 | 3 |
| 52 | 35 | December | 11 | 2 |
| 70 | 50 | Year | 21 | 10 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 48 | 30 | January | 9 | -1 |
| 53 | 33 | February | 12 | 1 |
| 61 | 40 | March | 16 | 4 |
| 71 | 48 | April | 22 | 9 |
| 79 | 57 | May | 26 | 14 |
| 86 | 65 | June | 30 | 18 |
| 88 | 69 | July | 31 | 20 |
| 88 | 68 | August | 31 | 20 |
| 83 | 61 | September | 28 | 16 |
| 72 | 49 | October | 22 | 9 |
| 60 | 38 | November | 16 | 3 |
| 51 | 33 | December | 11 | 0 |
| 70 | 49 | Year | 21 | 10 |
Days of Hot Weather in Knoxville
The hottest temperatures at Knoxville are usually in the 90s Fahrenheit. It's rare for the thermometer here to reach 100 °F (38 °C). A day that hot shows up only once every three years on average, typically in June, July or August.
| 70 °F 21 °C |
80 °F 27 °C |
90 °F 32 °C | |
|---|---|---|---|
| January | 1 | 0 | 0 |
| February | 2 | 0 | 0 |
| March | 8 | 1 | 0 |
| April | 18 | 6 | 0 |
| May | 27 | 16 | 1 |
| June | 30 | 26 | 7 |
| July | 31 | 30 | 13 |
| August | 31 | 29 | 11 |
| September | 29 | 20 | 5 |
| October | 19 | 5 | 0 |
| November | 5 | 0 | 0 |
| December | 1 | 0 | 0 |
| Year | 202 | 135 | 37 |
How Often Knoxville Has Cold Temperatures
On Knoxville's chilliest nights the thermometer drops to 10 °F (-12 °C) or even less. But that happens on average just one night in a winter.
Even after a crisp night, most days in the city are warm enough to thaw things out. Typically only five days a year stay below freezing for the entire day.
| 20 °F -8 °C |
32 °F 0 °C |
40 °F 4 °C | |
|---|---|---|---|
| January | 5 | 19 | 25 |
| February | 2 | 14 | 22 |
| March | 1 | 8 | 16 |
| April | 0 | 1 | 6 |
| May | 0 | 0 | 1 |
| June | 0 | 0 | 0 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 0 |
| October | 0 | 1 | 6 |
| November | 0 | 9 | 19 |
| December | 2 | 16 | 24 |
| Year | 11 | 67 | 119 |
References
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.
NOAA National Centers for Environmental Information (NCEI). Climate Normals.