Marietta/Dobbins AFB climate by month
Averages and records for each calendar month at Marietta/Dobbins AFB, United States, from 1949 to 2026. The warmest month is July, averaging 31.5°C; the coolest is January at 11.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 11.1°C | 0.7°C | 25.0°C11 January 1949 | −20.0°C24 January 1963 | 18 / 18 |
| February | 14.0°C | 2.6°C | 26.0°C19 February 2026 | −16.7°C17 February 1958 | 17 / 17 |
| March | 16.4°C | 4.6°C | 29.7°C22 March 2026 | −12.2°C5 March 1960 | 17 / 18 |
| April | 22.0°C | 9.4°C | 31.1°C17 April 1955 | −2.2°C16 April 1950 | 17 / 18 |
| May | 26.7°C | 14.8°C | 34.4°C25 May 1953 | 3.9°C13 May 1960 | 17 / 18 |
| June | 30.0°C | 18.9°C | 37.8°C27 June 1952 | 7.8°C3 June 1956 | 17 / 18 |
| July | 31.5°C | 20.9°C | 38.9°C28 July 1952 | 13.3°C11 July 1952 | 17 / 18 |
| August | 31.3°C | 20.3°C | 37.8°C16 August 1954 | 12.8°C29 August 1968 | 17 / 18 |
| September | 27.9°C | 16.7°C | 37.2°C1 September 1951 | 3.9°C30 September 1949 | 16 / 17 |
| October | 22.6°C | 10.6°C | 35.0°C5 October 1954 | −5.0°C30 October 1952 | 16 / 16 |
| November | 16.2°C | 3.9°C | 28.3°C2 November 1961 | −15.6°C25 November 1950 | 16 / 16 |
| December | 11.4°C | 0.8°C | 24.4°C27 December 2025 | −18.3°C13 December 1962 | 16 / 16 |
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 16 to 18 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.