Barometric Pressure Forecast for Mexico, Mexico
Barometric pressure forecast for Mexico — a national reference reading taken near the geographic centre of the country, on the high plateau of Zacatecas. See current barometric pressure and what it means for weather-sensitive people.
Download Pressure Pal to track barometric pressure and get migraine alerts for Mexico and your area.
Pressure and weather in Mexico
Mexico spans more than eighteen degrees of latitude, two ocean basins and elevations from sea level to over 5,000 metres, so a single national reading is a reference point rather than a local forecast. That said, the country shares a recognisable annual rhythm. From late May into October the rainy season sets in over most of the interior, driven by the northward migration of the intertropical convergence zone and afternoon convection over the Sierra Madre ranges, and at these latitudes the day-to-day pressure variation is small while the twice-daily atmospheric tide becomes the most visible feature on a chart. Both coasts run a tropical cyclone season from roughly mid-May to the end of November, the eastern Pacific side being the busier of the two, and a landfalling system is the one event capable of producing a large, fast pressure fall anywhere in the country. In winter the pattern reverses. Cold surges known as nortes push down the Gulf coast behind continental fronts, bringing sudden strong northerly wind, a temperature drop and a sharp pressure rise across Veracruz, Tabasco and the Yucatan. Elevation complicates everything: because most Mexican cities sit well above sea level, the raw station reading and the sea-level-adjusted number differ substantially.
What this means for you
For anywhere in Mexico, the sea-level-adjusted number is what compares across the country, while your own station reading depends on altitude. Set a migraine tracker app to log the trend rather than the absolute value.