Nantucket Mem Arpt weather by month
Averages and records for each calendar month at Nantucket Mem Arpt, United States, from 1948 to 2026. The warmest month is July, averaging 24.1°C; the coolest is January at 3.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.8°C | −3.5°C | 17.2°C24 January 1967 | −19.4°C16 January 2004 | 64 / 64 |
| February | 3.9°C | −3.3°C | 16.1°C16 February 2023 | −19.3°C4 February 2023 | 64 / 64 |
| March | 6.6°C | −0.5°C | 18.9°C23 March 2012 | −13.9°C4 March 1950 | 63 / 63 |
| April | 11.0°C | 3.5°C | 28.3°C26 April 2009 | −6.7°C4 April 1954 | 63 / 64 |
| May | 15.8°C | 8.0°C | 29.4°C25 May 2007 | −2.2°C27 May 1972 | 64 / 64 |
| June | 20.4°C | 12.9°C | 33.3°C21 June 2012 | 1.7°C3 June 1976 | 63 / 64 |
| July | 24.1°C | 16.8°C | 33.3°C1 July 1964 | 8.3°C8 July 1972 | 64 / 64 |
| August | 24.1°C | 16.8°C | 37.8°C2 August 1975 | 3.9°C31 August 1965 | 64 / 64 |
| September | 21.2°C | 13.6°C | 30.0°C9 September 1971 | 1.1°C22 September 1973 | 61 / 64 |
| October | 16.5°C | 9.0°C | 28.3°C9 October 2011 | −5.6°C31 October 1966 | 61 / 62 |
| November | 11.6°C | 4.3°C | 23.3°C2 November 1971 | −8.9°C25 November 2000 | 62 / 62 |
| December | 6.7°C | −0.7°C | 18.9°C25 December 2015 | −19.4°C31 December 1962 | 61 / 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 61 to 64 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.