Piedras Negras, Coah. climate by month
Averages and records for each calendar month at Piedras Negras, Coah., Mexico, from 1955 to 2025. The warmest month is July, averaging 38.4°C; the coolest is January at 19.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 19.8°C | 4.7°C | 37.2°C12 January 2000 | −9.4°C13 January 1956 | 21 / 54 |
| February | 22.4°C | 6.9°C | 40.0°C24 February 2008 | −9.4°C4 February 1956 | 18 / 55 |
| March | 26.1°C | 10.7°C | 40.0°C29 March 1998 | −7.2°C27 March 1955 | 21 / 54 |
| April | 30.7°C | 14.7°C | 44.2°C21 April 1984 | −1.1°C2 April 1955 | 21 / 55 |
| May | 34.3°C | 19.7°C | 45.0°C15 May 2003 | 5.6°C8 May 1960 | 22 / 54 |
| June | 37.5°C | 22.8°C | 48.3°C27 June 1998 | 10.0°C5 June 1955 | 23 / 54 |
| July | 38.4°C | 23.7°C | 46.7°C28 July 1995 | 16.7°C6 July 1957 | 26 / 55 |
| August | 38.2°C | 23.9°C | 46.2°C29 August 2011 | 15.0°C24 August 1957 | 26 / 54 |
| September | 35.5°C | 21.1°C | 46.1°C4 September 2000 | 8.9°C30 September 1956 | 26 / 53 |
| October | 29.8°C | 15.3°C | 41.2°C11 October 2020 | −3.3°C25 October 1955 | 20 / 53 |
| November | 23.5°C | 9.1°C | 36.2°C2 November 2016 | −7.2°C27 November 1956 | 20 / 52 |
| December | 20.0°C | 5.2°C | 33.6°C15 December 2019 | −10.6°C30 December 1983 | 19 / 52 |
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 18 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.