St Paul Island Arpt climate by month
Averages and records for each calendar month at St Paul Island Arpt, United States, from 1915 to 2026. The warmest month is August, averaging 10.8°C; the coolest is February at −2.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −1.3°C | −5.7°C | 8.9°C3 January 1916 | −32.2°C27 January 1919 | 109 / 109 |
| February | −2.1°C | −6.8°C | 6.7°C17 February 1917 | −26.7°C6 February 1991 | 110 / 110 |
| March | −1.6°C | −6.7°C | 10.0°C18 March 1980 | −28.3°C14 March 1971 | 110 / 110 |
| April | 0.8°C | −3.9°C | 9.4°C28 April 1993 | −22.2°C23 April 1976 | 109 / 109 |
| May | 4.2°C | −0.3°C | 15.0°C27 May 1997 | −13.3°C5 May 1971 | 108 / 109 |
| June | 7.8°C | 3.1°C | 16.7°C22 June 1926 | −8.9°C3 June 1985 | 107 / 108 |
| July | 10.1°C | 6.0°C | 18.3°C7 July 2008 | −2.2°C13 July 1961 | 108 / 109 |
| August | 10.8°C | 7.2°C | 18.9°C25 August 1987 | −1.7°C15 August 1981 | 107 / 110 |
| September | 9.5°C | 5.1°C | 16.7°C12 September 1925 | −5.6°C24 September 1992 | 108 / 110 |
| October | 5.8°C | 1.5°C | 12.2°C7 October 1915 | −11.1°C30 October 1983 | 107 / 109 |
| November | 2.8°C | −1.3°C | 10.0°C5 November 1915 | −15.6°C26 November 1988 | 109 / 109 |
| December | 0.4°C | −3.9°C | 11.1°C24 December 1936 | −20.6°C30 December 1916 | 108 / 110 |
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 107 to 110 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.