Charleston/Yeager Arpt climate by month
Averages and records for each calendar month at Charleston/Yeager Arpt, United States, from 1947 to 2026. The warmest month is July, averaging 29.9°C; the coolest is January at 6.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 6.0°C | −3.8°C | 26.7°C11 January 2020 | −26.7°C19 January 1994 | 79 / 79 |
| February | 8.4°C | −2.4°C | 27.2°C20 February 2018 | −24.4°C5 February 1996 | 79 / 79 |
| March | 13.8°C | 1.6°C | 31.7°C14 March 1990 | −17.8°C3 March 1980 | 79 / 79 |
| April | 20.1°C | 6.6°C | 34.4°C27 April 1990 | −7.2°C9 April 1972 | 79 / 79 |
| May | 24.4°C | 11.3°C | 34.4°C31 May 2011 | −3.3°C10 May 1966 | 79 / 79 |
| June | 28.3°C | 15.8°C | 39.4°C29 June 2012 | 0.6°C11 June 1972 | 79 / 79 |
| July | 29.9°C | 18.3°C | 40.0°C16 July 1988 | 7.8°C10 July 1961 | 79 / 79 |
| August | 29.3°C | 17.6°C | 40.0°C16 August 2007 | 5.0°C29 August 1965 | 78 / 78 |
| September | 26.1°C | 13.7°C | 38.9°C2 September 1953 | 1.1°C29 September 1951 | 77 / 78 |
| October | 20.2°C | 7.2°C | 34.4°C3 October 2019 | −8.3°C27 October 1962 | 78 / 78 |
| November | 13.7°C | 2.0°C | 29.4°C5 November 1948 | −14.4°C25 November 1950 | 78 / 78 |
| December | 8.3°C | −1.7°C | 26.7°C10 December 1971 | −24.4°C23 December 1989 | 79 / 79 |
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 77 to 79 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.