Fort Smith Rgnl climate by month
Averages and records for each calendar month at Fort Smith Rgnl, United States, from 1945 to 2026. The warmest month is July, averaging 34.2°C; the coolest is January at 9.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 9.8°C | −2.1°C | 27.2°C19 January 1952 | −23.3°C11 January 1977 | 81 / 81 |
| February | 12.8°C | 0.2°C | 31.1°C23 February 2017 | −22.8°C2 February 1951 | 81 / 81 |
| March | 17.9°C | 4.7°C | 35.0°C22 March 2026 | −13.9°C11 March 1948 | 81 / 81 |
| April | 23.3°C | 9.9°C | 35.6°C18 April 2006 | −5.6°C3 April 1975 | 81 / 81 |
| May | 27.1°C | 15.0°C | 36.7°C29 May 1951 | 1.7°C4 May 1954 | 81 / 81 |
| June | 31.6°C | 19.8°C | 41.1°C27 June 2012 | 8.3°C3 June 1964 | 81 / 81 |
| July | 34.2°C | 21.9°C | 43.9°C13 July 1954 | 10.0°C6 July 1972 | 81 / 81 |
| August | 34.0°C | 21.3°C | 46.1°C3 August 2011 | 10.6°C13 August 1967 | 81 / 81 |
| September | 30.0°C | 17.1°C | 42.8°C4 September 1998 | 0.6°C29 September 1967 | 80 / 82 |
| October | 24.4°C | 10.3°C | 35.6°C1 October 1953 | −5.6°C29 October 1952 | 81 / 81 |
| November | 17.1°C | 4.0°C | 31.7°C18 November 2025 | −13.3°C29 November 1976 | 81 / 81 |
| December | 11.4°C | −0.2°C | 28.9°C27 December 2025 | −20.6°C23 December 1989 | 81 / 81 |
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 80 to 81 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.