St Thomas/King Arpt climate by month
Averages and records for each calendar month at St Thomas/King Arpt, U.S. Virgin Islands, from 1953 to 2026. The warmest month is August, averaging 32.1°C; the coolest is January at 29.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 29.0°C | 22.5°C | 33.9°C3 January 1996 | 17.2°C8 January 1956 | 58 / 62 |
| February | 29.1°C | 22.5°C | 33.9°C1 February 1993 | 16.7°C29 February 1972 | 61 / 64 |
| March | 29.4°C | 22.8°C | 35.6°C25 March 2024 | 15.6°C1 March 1972 | 63 / 64 |
| April | 29.9°C | 23.6°C | 35.6°C30 April 1992 | 16.7°C11 April 1972 | 61 / 64 |
| May | 30.6°C | 24.7°C | 36.1°C7 May 1983 | 18.9°C5 May 1974 | 60 / 64 |
| June | 31.5°C | 25.5°C | 37.2°C23 June 1996 | 19.4°C20 June 1972 | 62 / 64 |
| July | 32.0°C | 25.7°C | 36.7°C27 July 1994 | 18.9°C22 July 1999 | 59 / 62 |
| August | 32.1°C | 25.8°C | 37.2°C8 August 1979 | 18.3°C7 August 2001 | 59 / 63 |
| September | 31.7°C | 25.5°C | 36.7°C1 September 1993 | 17.8°C17 September 1972 | 54 / 62 |
| October | 31.3°C | 25.0°C | 36.1°C4 October 1992 | 17.8°C15 October 2015 | 57 / 60 |
| November | 30.4°C | 24.1°C | 35.0°C1 November 1993 | 16.1°C25 November 1999 | 58 / 61 |
| December | 29.5°C | 23.1°C | 33.3°C6 December 1988 | 16.7°C5 December 1972 | 60 / 62 |
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 54 to 63 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.