Mont-de-Marsan Arpt climate by month
Averages and records for each calendar month at Mont-de-Marsan Arpt, France, from 1973 to 2025. The warmest month is August, averaging 28.3°C; the coolest is January at 10.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 10.8°C | 1.0°C | 23.4°C1 January 2022 | −18.5°C8 January 1985 | 23 / 48 |
| February | 13.1°C | 1.2°C | 26.7°C27 February 2019 | −11.5°C11 February 2012 | 21 / 47 |
| March | 16.4°C | 3.1°C | 30.1°C29 March 2023 | −11.5°C1 March 2005 | 29 / 49 |
| April | 18.8°C | 4.8°C | 32.0°C30 April 2005 | −5.4°C4 April 1996 | 30 / 49 |
| May | 22.3°C | 9.4°C | 35.0°C29 May 2001 | −1.0°C8 May 1974 | 39 / 49 |
| June | 25.7°C | 12.6°C | 41.0°C18 June 2022 | 2.0°C2 June 1975 | 31 / 49 |
| July | 28.1°C | 15.0°C | 40.8°C18 July 2022 | 5.0°C8 July 1978 | 37 / 49 |
| August | 28.3°C | 14.4°C | 41.4°C4 August 2003 | 4.1°C30 August 1986 | 38 / 49 |
| September | 25.2°C | 10.6°C | 39.2°C12 September 2022 | 1.0°C21 September 1977 | 34 / 48 |
| October | 20.6°C | 9.1°C | 33.6°C4 October 2004 | −4.6°C25 October 2003 | 31 / 49 |
| November | 14.2°C | 3.8°C | 26.4°C8 November 1985 | −10.4°C23 November 1988 | 18 / 49 |
| December | 11.1°C | −0.4°C | 23.1°C15 December 1989 | −13.7°C25 December 2001 | 21 / 48 |
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 18 to 39 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.