San Benito, United States weather by month
Measured at Port Isabel/Cameron Cnty
Averages and records for each calendar month at Port Isabel/Cameron Cnty, United States, from 1998 to 2026. The warmest month is August, averaging 34.3°C; the coolest is January at 21.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 21.4°C | 11.4°C | 34.4°C21 January 2017 | −2.7°C16 January 2024 | 27 / 28 |
| February | 23.1°C | 13.5°C | 33.9°C3 February 2006 | −5.5°C15 February 2021 | 27 / 28 |
| March | 25.9°C | 16.8°C | 38.3°C27 March 2009 | 2.2°C5 March 2007 | 27 / 28 |
| April | 28.6°C | 20.3°C | 38.9°C26 April 2017 | 6.1°C8 April 2007 | 28 / 28 |
| May | 31.1°C | 23.3°C | 38.9°C4 May 1999 | 8.3°C3 May 2010 | 28 / 28 |
| June | 33.1°C | 25.3°C | 38.9°C22 June 2017 | 19.4°C3 June 2016 | 27 / 28 |
| July | 33.8°C | 25.7°C | 38.9°C24 July 2018 | 21.1°C25 July 2019 | 26 / 28 |
| August | 34.3°C | 25.6°C | 38.9°C23 August 2010 | 20.6°C29 August 2015 | 26 / 27 |
| September | 32.4°C | 24.2°C | 38.3°C3 September 2000 | 13.9°C27 September 2000 | 24 / 28 |
| October | 29.8°C | 20.7°C | 36.1°C4 October 2023 | 6.7°C30 October 2025 | 27 / 28 |
| November | 25.9°C | 16.3°C | 33.3°C1 November 2010 | 1.7°C28 November 2011 | 28 / 28 |
| December | 22.6°C | 12.7°C | 32.8°C23 December 2015 | −2.2°C25 December 2004 | 28 / 28 |
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 28 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.