Chattanooga Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Chattanooga, 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 Chattanooga, 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.

10-year temperature averages for Chattanooga, 2010 to 2019
High °F Low °F   High °C Low °C
50 31 January 10 0
56 36 February 13 2
64 43 March 18 6
75 51 April 24 11
83 60 May 28 16
89 68 June 32 20
91 72 July 33 22
90 70 August 32 21
86 65 September 30 18
75 52 October 24 11
62 40 November 17 4
55 37 December 13 3
73 52 Year 23 11
30-year temperature averages for Chattanooga, 1991 to 2020
High °F Low °F   High °C Low °C
51 32 January 11 0
56 36 February 13 2
64 42 March 18 6
74 50 April 23 10
81 59 May 27 15
88 67 June 31 20
91 71 July 33 22
90 70 August 32 21
84 64 September 29 18
74 51 October 23 11
62 40 November 17 5
53 35 December 12 2
72 52 Year 22 11

Days of Hot Weather in Chattanooga

About half of summer days at Chattanooga have highs in the 90s Fahrenheit. Just twice a year on average the thermometer makes it to 100 °F (38 °C).

Days per month in Chattanooga 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 3 0 0
March 10 2 0
April 21 9 0
May 29 19 3
June 30 27 12
July 31 30 19
August 31 30 17
September 29 23 7
October 22 9 0
November 7 1 0
December 2 0 0
Year 215 149 58

How Often Chattanooga Has Cold Temperatures

A cold night at Chattanooga usually means lows below 20 °F. Typically seven nights a winter get that cold, with one night dropping as low as 10 °F (-12 °C) or below.

No matter how cold the night, afternoon temperatures here usually warm up to above freezing. The city averages just two days a year when it doesn't thaw.

Days per month on average in Chattanooga 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 4 17 24
February 1 12 20
March 0 5 14
April 0 0 5
May 0 0 0
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 0 0 4
November 0 7 17
December 1 15 23
Year 7 56 107
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.

Tennessee Temperatures
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