D15-FA-1 Sea weather by month
Averages and records for each calendar month at D15-FA-1 Sea, Netherlands, from 2009 to 2026. The warmest month is August, averaging 17.8°C; the coolest is February at 6.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 7.2°C | 4.7°C | 11.1°C2 January 2015 | −1.1°C17 January 2013 | 17 / 17 |
| February | 6.6°C | 4.3°C | 10.9°C1 February 2016 | −5.4°C28 February 2018 | 16 / 17 |
| March | 7.2°C | 5.0°C | 11.6°C31 March 2021 | −3.8°C11 March 2013 | 16 / 18 |
| April | 8.7°C | 6.5°C | 13.7°C20 April 2011 | −0.1°C5 April 2021 | 17 / 18 |
| May | 11.3°C | 9.2°C | 17.7°C25 May 2026 | 2.4°C30 May 2011 | 17 / 17 |
| June | 14.4°C | 12.4°C | 21.2°C25 June 2023 | 6.6°C1 June 2011 | 17 / 17 |
| July | 17.0°C | 14.9°C | 25.4°C26 July 2019 | 10.9°C20 July 2012 | 15 / 17 |
| August | 17.8°C | 15.7°C | 22.7°C14 August 2025 | 10.7°C29 August 2010 | 16 / 17 |
| September | 16.4°C | 14.3°C | 21.4°C10 September 2023 | 9.6°C27 September 2022 | 16 / 16 |
| October | 14.1°C | 11.7°C | 18.6°C3 October 2011 | 2.9°C27 October 2012 | 17 / 17 |
| November | 11.2°C | 8.7°C | 16.1°C1 November 2014 | −0.9°C30 November 2010 | 17 / 17 |
| December | 8.8°C | 6.4°C | 12.6°C7 December 2025 | −1.8°C19 December 2010 | 17 / 17 |
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 15 to 17 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.