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.
| 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 |
| 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).
| 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.
| 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.