Caldwell/Essex Cnty climate by month
Averages and records for each calendar month at Caldwell/Essex Cnty, United States, from 1999 to 2026. The warmest month is July, averaging 30.2°C; the coolest is January at 3.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.7°C | −5.0°C | 21.7°C6 January 2007 | −18.8°C22 January 2025 | 27 / 27 |
| February | 5.5°C | −4.3°C | 26.1°C21 February 2018 | −19.9°C24 February 2015 | 26 / 27 |
| March | 10.7°C | 0.1°C | 28.9°C26 March 2021 | −17.2°C7 March 2003 | 27 / 27 |
| April | 17.1°C | 5.4°C | 35.0°C17 April 2002 | −5.6°C7 April 2002 | 27 / 27 |
| May | 22.6°C | 10.8°C | 35.6°C18 May 2017 | −0.5°C1 May 2008 | 27 / 27 |
| June | 27.4°C | 16.0°C | 38.3°C24 June 2025 | 3.9°C1 June 2001 | 28 / 28 |
| July | 30.2°C | 19.2°C | 39.4°C22 July 2011 | 9.4°C3 July 2001 | 28 / 28 |
| August | 29.0°C | 18.2°C | 38.3°C9 August 2001 | 8.9°C21 August 2000 | 28 / 28 |
| September | 25.1°C | 14.1°C | 35.6°C7 September 2023 | 2.8°C29 September 2000 | 27 / 28 |
| October | 18.7°C | 7.7°C | 34.4°C2 October 2019 | −3.3°C29 October 2001 | 27 / 27 |
| November | 12.5°C | 2.1°C | 27.8°C1 November 2024 | −11.6°C23 November 2018 | 27 / 27 |
| December | 6.4°C | −2.1°C | 22.2°C6 December 2001 | −15.0°C14 December 2005 | 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 26 to 28 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.