Stephenville/Clark Rgnl climate by month
Averages and records for each calendar month at Stephenville/Clark Rgnl, United States, from 1921 to 2026. The warmest month is August, averaging 35.2°C; the coolest is January at 13.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 13.4°C | 0.2°C | 30.6°C20 January 2000 | −18.9°C31 January 1949 | 80 / 83 |
| February | 16.1°C | 2.6°C | 35.6°C23 February 1996 | −17.7°C16 February 2021 | 79 / 82 |
| March | 20.2°C | 6.5°C | 35.6°C21 March 2026 | −12.8°C11 March 1948 | 77 / 79 |
| April | 24.6°C | 11.2°C | 39.4°C18 April 1925 | −3.9°C7 April 2009 | 76 / 79 |
| May | 28.2°C | 16.1°C | 39.4°C5 May 1984 | 2.2°C3 May 2013 | 76 / 78 |
| June | 32.5°C | 20.1°C | 42.8°C28 June 1980 | 10.6°C9 June 1923 | 76 / 79 |
| July | 34.8°C | 21.6°C | 43.9°C27 July 1925 | 11.1°C3 July 1924 | 78 / 80 |
| August | 35.2°C | 21.5°C | 43.3°C17 August 2023 | 10.0°C28 August 1992 | 77 / 79 |
| September | 31.1°C | 17.7°C | 43.3°C27 September 1953 | 0.6°C27 September 1942 | 80 / 83 |
| October | 25.8°C | 12.2°C | 39.4°C3 October 1951 | −6.1°C31 October 1993 | 81 / 81 |
| November | 19.4°C | 5.9°C | 33.3°C8 November 1980 | −11.7°C11 November 1950 | 79 / 81 |
| December | 14.7°C | 1.6°C | 31.7°C4 December 2005 | −22.2°C23 December 1989 | 79 / 82 |
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 76 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.