Rouen weather by month
Measured at Rouen/Boos Arpt
Averages and records for each calendar month at Rouen/Boos Arpt, France, from 1973 to 2025. The warmest month is July, averaging 23.2°C; the coolest is December at 6.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 7.6°C | 2.0°C | 20.0°C3 January 1978 | −17.1°C17 January 1985 | 17 / 50 |
| February | 7.8°C | 1.6°C | 20.0°C25 February 1977 | −13.3°C7 February 1991 | 17 / 49 |
| March | 10.9°C | 2.1°C | 24.4°C31 March 2021 | −8.1°C4 March 2005 | 31 / 50 |
| April | 14.3°C | 3.7°C | 27.4°C20 April 2018 | −5.0°C10 April 1977 | 35 / 49 |
| May | 17.8°C | 7.5°C | 30.0°C13 May 1998 | −0.5°C2 May 1982 | 39 / 49 |
| June | 21.1°C | 10.1°C | 36.0°C21 June 2017 | 1.0°C1 June 1975 | 37 / 49 |
| July | 23.2°C | 12.4°C | 41.3°C25 July 2019 | 1.0°C28 July 1974 | 40 / 50 |
| August | 23.1°C | 12.3°C | 38.4°C9 August 2020 | 5.0°C28 August 1974 | 41 / 49 |
| September | 19.8°C | 9.8°C | 34.3°C10 September 2023 | 2.4°C21 September 1986 | 34 / 49 |
| October | 15.1°C | 6.4°C | 28.3°C10 October 2023 | −3.2°C29 October 1997 | 35 / 49 |
| November | 10.4°C | 4.4°C | 20.3°C7 November 2015 | −8.3°C24 November 1998 | 19 / 49 |
| December | 6.8°C | 0.2°C | 20.0°C6 December 1977 | −11.3°C29 December 1996 | 17 / 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 17 to 41 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.