Carbondale weather by month
Measured at Murphysboro/S Illinois Arpt
Averages and records for each calendar month at Murphysboro/S Illinois Arpt, United States, from 1998 to 2026. The warmest month is July, averaging 31.4°C; the coolest is January at 5.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 5.6°C | −4.1°C | 21.7°C29 January 2002 | −21.1°C24 January 2003 | 27 / 28 |
| February | 8.3°C | −2.4°C | 26.1°C27 February 2024 | −21.6°C19 February 2015 | 28 / 28 |
| March | 14.6°C | 2.9°C | 30.0°C21 March 2026 | −19.3°C6 March 2015 | 28 / 28 |
| April | 20.5°C | 8.0°C | 31.1°C30 April 2007 | −4.9°C8 April 2007 | 28 / 28 |
| May | 25.1°C | 13.4°C | 35.0°C26 May 2012 | 0.6°C9 May 2020 | 28 / 28 |
| June | 30.2°C | 18.2°C | 41.7°C29 June 2012 | 6.7°C1 June 2003 | 28 / 28 |
| July | 31.4°C | 20.1°C | 41.7°C5 July 2012 | 10.6°C28 July 2013 | 28 / 28 |
| August | 30.8°C | 18.5°C | 40.0°C4 August 2010 | 7.2°C26 August 2025 | 29 / 29 |
| September | 27.8°C | 13.8°C | 39.4°C5 September 2026 | 0.6°C30 September 2022 | 28 / 29 |
| October | 21.5°C | 7.5°C | 35.0°C2 October 2019 | −5.5°C20 October 2022 | 28 / 28 |
| November | 14.1°C | 2.0°C | 27.8°C8 November 2005 | −12.7°C12 November 2019 | 28 / 28 |
| December | 8.0°C | −1.8°C | 23.9°C2 December 2021 | −23.9°C25 December 2004 | 28 / 28 |
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 27 to 29 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.