New Haven/Tweed Arpt weather by month
Averages and records for each calendar month at New Haven/Tweed Arpt, United States, from 1948 to 2026. The warmest month is July, averaging 27.8°C; the coolest is January at 3.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.0°C | −5.2°C | 20.6°C12 January 2020 | −22.2°C19 January 1948 | 54 / 54 |
| February | 4.2°C | −4.6°C | 20.0°C16 February 2023 | −21.0°C14 February 2016 | 51 / 53 |
| March | 8.2°C | −0.7°C | 25.0°C26 March 2021 | −17.2°C6 March 1948 | 54 / 54 |
| April | 14.3°C | 4.3°C | 31.1°C14 April 2023 | −8.3°C3 April 1954 | 54 / 54 |
| May | 19.6°C | 9.5°C | 35.0°C31 May 2022 | −1.0°C1 May 2008 | 54 / 54 |
| June | 24.7°C | 15.0°C | 36.7°C25 June 2025 | 4.4°C1 June 1967 | 53 / 54 |
| July | 27.8°C | 18.6°C | 38.3°C22 July 2011 | 10.0°C11 July 2002 | 53 / 55 |
| August | 27.1°C | 17.9°C | 37.8°C27 August 1948 | 6.1°C31 August 1976 | 54 / 55 |
| September | 23.6°C | 13.8°C | 35.0°C7 September 2023 | 1.1°C28 September 1957 | 53 / 55 |
| October | 17.9°C | 8.0°C | 31.7°C2 October 2019 | −4.9°C19 October 2015 | 52 / 52 |
| November | 11.7°C | 2.5°C | 26.7°C7 November 2022 | −10.5°C23 November 2018 | 52 / 52 |
| December | 5.6°C | −2.5°C | 18.3°C27 December 1973 | −19.4°C27 December 1948 | 53 / 53 |
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 51 to 54 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.