For this Sunday, September 21, a low-pressure trough over southeastern Mexico, interacting with an upper-level trough, will cause intense rainfall in Oaxaca, Veracruz, Chiapas, Tabasco, and Campeche, as well as heavy rain in Yucatán and Quintana Roo, the National Water Commission reported.
On the other hand, a low-pressure area with the potential for cyclonic development off the southern coasts of Guerrero and Oaxaca, coupled with the proximity of the monsoon trough to the South and Central Pacific of Mexico, will interact with a low-pressure trough over the west and center of the country, generating showers and heavy rain in these regions, as well as very heavy to intense rain in Jalisco, Colima, Michoacán, and Guerrero.
The Mexican monsoon and atmospheric instability will maintain conditions for showers and heavy rain in the Baja California Peninsula, Sonora, Chihuahua, Durango, Sinaloa, and Nayarit.
Likewise, the influx of moisture generated by the subtropical jet stream will increase the likelihood of rain in Baja California.
A low-pressure channel over the northeast and east of Mexico, combined with the influx of moisture from the Gulf of Mexico, will bring showers and heavy rain to these regions and to the north of the country, as well as very heavy rain in Puebla.
All forecasted rains will be accompanied by lightning and could include hail. Rainfall forecast for today, September 21, 2025:
Very heavy rain with intense rainfall (75 to 150 mm): Guerrero (south), Oaxaca (east and coast), Veracruz (south), Tabasco (west), Chiapas (north, west, and south), and Campeche (west and southwest). Heavy rain with very heavy rainfall (50 to 75 mm): Jalisco, Colima, Michoacán, and Puebla.
Showers with occasional heavy rain (25 to 50 mm): Baja California, Baja California Sur, Sonora, Chihuahua, Durango, Sinaloa, Nayarit, Morelos, State of Mexico, Mexico City, Yucatán, and Quintana Roo.
Showers (5 to 25 mm): Nuevo León, Tamaulipas, San Luis Potosí, Zacatecas, Hidalgo, and Tlaxcala. Isolated showers (0.1 to 5 mm): Coahuila, Aguascalientes, Guanajuato, and Querétaro. Heavy to intense rains could reduce visibility on stretches of roads, raise river and stream levels, and cause ponding, landslides, and flooding.
Strong wind gusts could cause trees and billboards to fall. Maximum temperature forecast for today, September 21, 2025: Maximum temperatures of 35 to 40°C: Baja California, Baja California Sur, Sonora, Chihuahua, Coahuila, Nuevo León, Durango, Sinaloa, Jalisco, Colima, Michoacán, Oaxaca, Campeche, Yucatán, and Quintana Roo. Maximum temperatures of 30 to 35°C: Nayarit, Guerrero, Chiapas, Tamaulipas, San Luis Potosí, Querétaro (north), Hidalgo (north), Puebla (north), Veracruz, and Tabasco.
Minimum temperature forecast for today, September 21, 2025: Minimum temperatures of 0 to 5°C: mountainous areas of the State of Mexico, Tlaxcala, and Puebla.
Source: chiapas.quadratin
