Sussex Arpt climate by month
Averages and records for each calendar month at Sussex Arpt, United States, from 2000 to 2026. The warmest month is July, averaging 29.3°C; the coolest is January at 2.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.4°C | −7.4°C | 20.6°C6 January 2007 | −26.0°C16 January 2009 | 26 / 26 |
| February | 4.3°C | −6.8°C | 24.4°C21 February 2018 | −26.6°C24 February 2015 | 26 / 26 |
| March | 9.6°C | −2.1°C | 26.7°C10 March 2026 | −22.8°C7 March 2003 | 26 / 26 |
| April | 16.6°C | 3.3°C | 33.9°C17 April 2002 | −8.9°C7 April 2002 | 26 / 26 |
| May | 22.1°C | 8.7°C | 35.0°C19 May 2026 | −2.7°C1 May 2008 | 26 / 26 |
| June | 26.5°C | 13.5°C | 37.2°C24 June 2025 | 1.7°C1 June 2001 | 26 / 26 |
| July | 29.3°C | 16.7°C | 38.3°C6 July 2010 | 6.1°C3 July 2001 | 25 / 26 |
| August | 28.1°C | 15.6°C | 37.8°C9 August 2001 | 7.2°C13 August 2006 | 26 / 26 |
| September | 24.2°C | 11.2°C | 33.9°C8 September 2015 | −1.0°C22 September 2020 | 24 / 26 |
| October | 17.9°C | 5.3°C | 32.8°C2 October 2019 | −6.6°C19 October 2015 | 26 / 26 |
| November | 11.3°C | −0.3°C | 27.2°C6 November 2024 | −14.3°C23 November 2018 | 24 / 26 |
| December | 5.2°C | −4.2°C | 22.2°C6 December 2001 | −23.9°C14 December 2005 | 25 / 26 |
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 26 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.