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July is the hottest month in Chattanooga TN, with an average high of 90°F / 32°C; January is the coldest (51°F / 11°C). March is the wettest month, averaging 5.4 in / 136 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 51 / 11 | 32 / 0 | 5.0 / 128 | 9 |
| Feb | 56 / 13 | 35 / 2 | 5.0 / 128 | 9 |
| Mar | 64 / 18 | 42 / 6 | 5.4 / 136 | 10 |
| Apr | 73 / 23 | 50 / 10 | 4.9 / 124 | 9 |
| May | 81 / 27 | 59 / 15 | 3.9 / 100 | 9 |
| Jun | 87 / 31 | 67 / 19 | 4.2 / 106 | 10 |
| Jul | 90 / 32 | 71 / 21 | 5.1 / 129 | 10 |
| Aug | 90 / 32 | 70 / 21 | 3.7 / 93 | 8 |
| Sep | 84 / 29 | 63 / 17 | 4.3 / 108 | 6 |
| Oct | 74 / 23 | 51 / 11 | 3.6 / 91 | 6 |
| Nov | 62 / 17 | 40 / 4 | 4.8 / 122 | 8 |
| Dec | 53 / 12 | 35 / 2 | 5.2 / 133 | 9 |
Extremes since 1938: highest 107°F / 42°C (June 30, 2012), lowest -13°F / -25°C (January 26, 1940).
Daylight lasts about 14.4 hours in June and 9.6 hours in December.
Data: Meteostat — Lovell Field, 1991–2020 averages.
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