Chatham Muni climate by month
Averages and records for each calendar month at Chatham Muni, United States, from 1996 to 2026. The warmest month is July, averaging 26.0°C; the coolest is January at 3.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.9°C | −3.3°C | 15.0°C4 January 1998 | −20.6°C16 January 2004 | 29 / 30 |
| February | 4.5°C | −2.9°C | 17.2°C10 February 2023 | −19.9°C14 February 2016 | 30 / 30 |
| March | 7.3°C | 0.1°C | 18.9°C21 March 2012 | −13.2°C1 March 2015 | 30 / 30 |
| April | 11.8°C | 4.3°C | 29.4°C17 April 2002 | −4.9°C5 April 2016 | 30 / 30 |
| May | 16.8°C | 9.3°C | 32.2°C25 May 2007 | −0.6°C7 May 2001 | 30 / 30 |
| June | 22.1°C | 14.4°C | 33.9°C21 June 2012 | 5.0°C2 June 2026 | 30 / 30 |
| July | 26.0°C | 18.2°C | 37.2°C5 July 1999 | 10.0°C21 July 2000 | 30 / 31 |
| August | 25.6°C | 17.9°C | 36.7°C2 August 2006 | 9.4°C25 August 2004 | 31 / 31 |
| September | 22.1°C | 14.6°C | 32.2°C1 September 2010 | 2.8°C20 September 2019 | 30 / 31 |
| October | 16.7°C | 9.1°C | 28.3°C9 October 2011 | −2.2°C23 October 1997 | 30 / 30 |
| November | 11.3°C | 3.9°C | 22.8°C7 November 2024 | −8.9°C25 November 2000 | 30 / 30 |
| December | 6.9°C | −0.3°C | 18.3°C5 December 2001 | −13.8°C29 December 2017 | 30 / 30 |
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 29 to 31 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.