Cape Girardeau Rgnl climate by month
Averages and records for each calendar month at Cape Girardeau Rgnl, United States, from 1960 to 2026. The warmest month is July, averaging 32.0°C; the coolest is January at 5.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 5.5°C | −4.3°C | 22.8°C23 January 1967 | −27.8°C11 January 1977 | 66 / 66 |
| February | 8.4°C | −2.1°C | 26.1°C13 February 1962 | −25.5°C19 February 2015 | 66 / 66 |
| March | 14.5°C | 3.0°C | 29.4°C22 March 2026 | −22.1°C6 March 2015 | 65 / 65 |
| April | 20.7°C | 8.3°C | 32.8°C27 April 1989 | −7.8°C8 April 2007 | 65 / 65 |
| May | 25.7°C | 13.8°C | 36.1°C24 May 1996 | −1.1°C17 May 1968 | 65 / 65 |
| June | 30.5°C | 18.4°C | 41.7°C29 June 2012 | 6.1°C1 June 1972 | 67 / 67 |
| July | 32.0°C | 20.5°C | 41.1°C5 July 2012 | 9.4°C27 July 1962 | 67 / 67 |
| August | 31.2°C | 19.0°C | 40.6°C4 August 1964 | 7.2°C29 August 1986 | 67 / 67 |
| September | 27.7°C | 14.5°C | 38.3°C5 September 2026 | 0.6°C30 September 1999 | 65 / 67 |
| October | 21.7°C | 7.9°C | 34.4°C1 October 2019 | −5.5°C20 October 2022 | 66 / 66 |
| November | 14.0°C | 2.7°C | 28.9°C1 November 2016 | −13.3°C29 November 1976 | 66 / 66 |
| December | 7.7°C | −1.8°C | 24.4°C2 December 1982 | −23.9°C22 December 1989 | 66 / 66 |
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 65 to 67 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.