Brookhaven Arpt climate by month
Averages and records for each calendar month at Brookhaven Arpt, United States, from 1999 to 2026. The warmest month is July, averaging 28.2°C; the coolest is January at 4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 4.1°C | −4.5°C | 20.6°C12 January 2020 | −20.5°C17 January 2009 | 27 / 27 |
| February | 5.2°C | −4.0°C | 21.7°C16 February 2023 | −18.8°C21 February 2015 | 27 / 27 |
| March | 9.3°C | −0.1°C | 26.1°C29 March 2025 | −15.6°C7 March 2003 | 27 / 27 |
| April | 14.7°C | 4.6°C | 33.9°C17 April 2002 | −6.0°C7 April 2007 | 27 / 27 |
| May | 20.0°C | 10.0°C | 33.9°C31 May 2022 | −1.1°C7 May 2001 | 27 / 27 |
| June | 25.1°C | 15.4°C | 37.8°C24 June 2025 | 3.9°C1 June 2001 | 27 / 27 |
| July | 28.2°C | 19.0°C | 39.4°C6 July 2010 | 7.8°C3 July 2001 | 27 / 27 |
| August | 27.6°C | 18.3°C | 36.7°C2 August 2006 | 8.9°C26 August 2004 | 27 / 27 |
| September | 24.1°C | 14.2°C | 33.9°C6 September 2023 | 2.2°C30 September 2000 | 25 / 27 |
| October | 18.1°C | 8.1°C | 31.7°C2 October 2019 | −2.8°C29 October 2001 | 26 / 27 |
| November | 12.6°C | 2.6°C | 26.7°C3 November 2000 | −17.1°C21 November 2018 | 26 / 27 |
| December | 7.3°C | −1.5°C | 20.0°C5 December 2001 | −16.1°C28 December 2004 | 27 / 27 |
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 25 to 27 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.