Chattanooga Metro climate by month
Averages and records for each calendar month at Chattanooga Metro, United States, from 1938 to 2026. The warmest month is July, averaging 32.2°C; the coolest is January at 9.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 9.9°C | −0.8°C | 25.6°C10 January 1949 | −25.0°C26 January 1940 | 88 / 88 |
| February | 12.5°C | 0.8°C | 27.8°C22 February 2023 | −17.2°C17 February 1958 | 88 / 88 |
| March | 17.3°C | 4.7°C | 31.1°C25 March 2007 | −13.3°C5 March 1960 | 88 / 88 |
| April | 22.8°C | 9.1°C | 33.9°C30 April 1942 | −3.9°C3 April 1992 | 89 / 89 |
| May | 26.8°C | 13.9°C | 37.2°C29 May 1941 | 1.1°C4 May 1971 | 89 / 89 |
| June | 30.7°C | 18.6°C | 41.7°C30 June 2012 | 5.0°C3 June 1956 | 89 / 89 |
| July | 32.2°C | 20.8°C | 41.7°C1 July 2012 | 10.6°C15 July 1967 | 89 / 89 |
| August | 31.8°C | 20.3°C | 40.6°C4 August 1947 | 10.0°C31 August 1946 | 89 / 89 |
| September | 28.7°C | 16.6°C | 39.4°C13 September 2019 | 2.2°C30 September 1967 | 88 / 89 |
| October | 23.1°C | 9.6°C | 37.8°C2 October 2019 | −5.6°C30 October 1952 | 88 / 88 |
| November | 16.5°C | 3.9°C | 30.0°C1 November 2016 | −15.6°C25 November 1950 | 88 / 88 |
| December | 11.4°C | 0.6°C | 25.6°C7 December 1951 | −18.9°C13 December 1962 | 88 / 88 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 88 to 89 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.