Decatur Muni climate by month
Averages and records for each calendar month at Decatur Muni, United States, from 2011 to 2026. The warmest month is August, averaging 35.6°C; the coolest is January at 13.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 13.3°C | 2.1°C | 29.4°C11 January 2023 | −13.3°C25 January 2026 | 14 / 15 |
| February | 15.9°C | 4.4°C | 34.4°C26 February 2024 | −16.0°C15 February 2021 | 14 / 15 |
| March | 20.7°C | 8.9°C | 32.2°C20 March 2017 | −12.1°C3 March 2014 | 13 / 15 |
| April | 23.7°C | 12.4°C | 35.0°C13 April 2025 | −0.5°C7 April 2018 | 15 / 15 |
| May | 27.9°C | 17.1°C | 36.7°C15 May 2022 | 1.1°C3 May 2013 | 14 / 15 |
| June | 32.7°C | 21.9°C | 41.7°C27 June 2023 | 14.4°C1 June 2015 | 15 / 15 |
| July | 35.4°C | 23.9°C | 43.9°C19 July 2022 | 16.7°C3 July 2013 | 16 / 16 |
| August | 35.6°C | 23.8°C | 43.9°C17 August 2023 | 16.7°C17 August 2013 | 16 / 16 |
| September | 31.4°C | 19.9°C | 43.3°C8 September 2023 | 8.9°C29 September 2020 | 15 / 16 |
| October | 25.6°C | 13.9°C | 37.2°C7 October 2014 | −3.2°C31 October 2019 | 14 / 15 |
| November | 19.0°C | 7.6°C | 33.3°C2 November 2017 | −7.1°C12 November 2019 | 15 / 15 |
| December | 15.0°C | 4.3°C | 29.4°C26 December 2025 | −13.2°C22 December 2022 | 14 / 15 |
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 13 to 16 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.