Westerland/Sylt Arpt climate by month
Averages and records for each calendar month at Westerland/Sylt Arpt, Germany, from 1936 to 1961. The warmest month is August, averaging 20.0°C; the coolest is February at 2.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.4°C | −1.4°C | 8.7°C1 January 1960 | −20.8°C26 January 1942 | 24 / 24 |
| February | 2.0°C | −2.0°C | 10.7°C25 February 1961 | −23.5°C13 February 1940 | 24 / 24 |
| March | 5.0°C | 0.2°C | 17.0°C30 March 1948 | −14.8°C6 March 1942 | 24 / 24 |
| April | 9.6°C | 3.7°C | 21.9°C18 April 1948 | −4.8°C1 April 1958 | 24 / 24 |
| May | 14.4°C | 7.7°C | 27.0°C14 May 1947 | −1.2°C3 May 1941 | 24 / 24 |
| June | 17.7°C | 11.4°C | 31.4°C29 June 1947 | 5.2°C1 June 1951 | 24 / 24 |
| July | 19.6°C | 13.8°C | 32.6°C12 July 1941 | 7.6°C3 July 1942 | 24 / 24 |
| August | 20.0°C | 14.0°C | 31.2°C23 August 1944 | 5.6°C11 August 1954 | 24 / 24 |
| September | 17.5°C | 11.8°C | 28.3°C5 September 1949 | 2.2°C30 September 1940 | 24 / 24 |
| October | 12.4°C | 7.7°C | 20.1°C6 October 1961 | −4.6°C29 October 1940 | 24 / 24 |
| November | 7.9°C | 3.9°C | 13.6°C6 November 1938 | −6.0°C28 November 1952 | 24 / 24 |
| December | 4.8°C | 1.2°C | 10.9°C4 December 1953 | −11.1°C25 December 1938 | 24 / 24 |
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 24 to 24 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.