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 1981 to 2010 weather.

10-year temperature averages for Knoxville, 2010 to 2019
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
30-year temperature averages for Knoxville, 1981 to 2010
High °F Low °F   High °C Low °C
47 29 January 9 -2
52 32 February 11 0
61 39 March 16 4
70 47 April 21 9
78 56 May 26 13
85 65 June 30 18
88 69 July 31 20
88 68 August 31 20
82 60 September 28 16
71 49 October 22 9
60 39 November 16 4
50 32 December 10 0
70 49 Year 21 9

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 or August.

Days per month in Knoxville of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 1 0 0
February 2 0 0
March 2 1 0
April 17 5 0
May 27 14 0
June 30 25 6
July 31 30 11
August 31 29 10
September 28 19 3
October 18 5 0
November 6 0 0
December 1 0 0
Year 198 129 31

How Often Knoxville Has Cold Temperatures

On Knoxville's chilliest nights the thermometer drops to 10 °F (-12 °C) or even less. Normally two nights a winter register a temperature that low.

Even after a crisp night, most days in the city are warm enough to thaw things out. Only five days a year on average stay below freezing for the entire day.

Days per month on average in Knoxville when the minimum temperature drops to 20, 32, or 40 °F or below
  20 °F
-8 °C
32 °F
0 °C
40 °F
4 °C
January 6 19 26
February 3 13 22
March 1 8 17
April 0 1 7
May 0 0 1
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 0 1 7
November 0 8 17
December 3 17 25
Year 12 67 121
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. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)

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