According to the Mexican Institute of Water Technology (IMTA), the cannula is a climatic phenomenon characterized by drought, decrease or absence of rain, and generally occurs between July and August.
The Conagua recently reported that since the first week of July 2025, a decrease in the accumulated rainfall in the East, Southeast and South of Mexico was observed, as well as in the coastal regions of the West, according to information from the National Meteorological Service (SMN).
The measurements indicated that June 2025 was the rainiest since 1941, with a surplus of 55.8% compared to the average from 1991 to 2020. On the contrary, from July 1 to 29 there were 21% less rain at the national level.
The cannula does not happen throughout Mexico or produces high temperatures
Unlike what can be considered, the cannula is not a generalized phenomenon, but is associated with the states of the Gulf of Mexico and the Pacific Ocean, including the Yucatan Peninsula.
According to the IMTA, Normally it occurs in Campeche, Colima, Chiapas, Guerrero, Hidalgo, Michoacán, Morelos, Nuevo León, Oaxaca, Puebla, Quintana Roo, San Luis Potosí, Tabasco, Tamaulipas, Tlaxcala, Veracruz and Yucatán.
Conagua stressed that its duration varies annually, in some regions it can start from June, extend until September or simply does not happen.
“To determine these dates, it is essential to wait for the end of the rainy season and its monitoring contributes to better planning in key sectors such as agriculture, public health and water management,” he said in his community.
And although it increases the thermal sensation, it does not imply that the highest temperatures of the year are observed, which occurs during May.
Rains by Mexican monsoon and tropical wave increase
Despite the decrease in accumulation of rainfall, since Monday the rains will continue over most of the country due to different meteorological phenomena.
The Northeast, East, Center, West and South of the Mexican Republic will have very strong specific rains due to a low pressure channel and the moisture entry of the Pacific Ocean and Gulf of Mexico. In particular, the rains will be very strong in Michoacán and Guerrero.
For its part, the Mexican monsoon will cause strong rainfall with electric shocks in Sonora, Chihuahua, Durango, Sinaloa and Nayarit; as well as isolated rains in Baja California Sur.
The new tropical wave number 20 will move through the Yucatan Peninsula, in interaction with the low pressure channel and moisture, will cause rains and electric shocks in the Mexican southeast.
Heat wave in northern Mexico
According to the SMN, the heat wave will be maintained in areas of Baja California, Baja California Sur, Sonora, and from today Sinaloa. While other entities of the Pacific coast, the Gulf of Mexico and the Yucatan Peninsula will have temperatures greater than 45 °.
Weather forecast
- Strong rains with very strong punctual (50 to 75 mm): Michoacán, Guerrero and Oaxaca.
- Chubascos with strong punctual rains (25 to 50 mm): Sonora, Chihuahua, Durango, Sinaloa, Nayarit, Jalisco, Colima, Chiapas, Veracruz, Tabasco, Campeche, Yucatán and Quintana Roo.
- Showers of showers (5 to 25 mm): Nuevo León, Tamaulipas, San Luis Potosí, Zacatecas, State of Mexico, Mexico City, Morelos and Puebla.
- Isolated rains (0.1 to 5 mm): Baja California Sur, Coahuila, Aguascalientes, Guanajuato, Querétaro, Hidalgo and Tlaxcala.
- Wind 30 to 40 km/h with gusts of 50 to 70 km/h: Coahuila, Nuevo León and Tamaulipas.
- Wind 20 to 30 km/h with gusts of 40 to 60 km/h: Gulf of California, Sonora, Chihuahua, Durango, San Luis Potosí, Zacatecas, Aguascalientes, Guanajuato, Puebla, Jalisco (Costa), Colima (Costa), Michoacán (Costa), Guerrero (Costa), Oaxaca, Chiapas and Quintana Roo; With possible hoppers: Baja California and Baja California Sur.
- 1.5 to 2.5 meters high swell: coasts of Jalisco, Colima, Michoacán, Guerrero, Oaxaca and Chiapas.
- Maximum temperatures greater than 45 ° C: Baja California (Northeast) and Sonora (Northwest and West).
- Maximum temperatures of 40 to 45 ° C: Baja California Sur (Sur), Sinaloa (North), Chihuahua (Southwest and Northeast), Coahuila (North and Northeast), Nuevo León (North and East) and Tamaulipas (Northwest and West).
- Maximum temperatures of 35 to 40 ° C: Nayarit, Jalisco, Colima, Michoacán, Guerrero, Oaxaca, Chiapas, Durango, San Luis Potosí, Querétaro (Norte), Hidalgo (North), Puebla (North), Veracruz, Tabasco, Campeche and Yucatán.
- Maximum temperatures of 30 to 35 ° C: Zacatecas, Guanajuato (Northeast), Morelos and Quintana Roo.
- Minimum temperatures of 0 to 5 ° C during the early hours of Tuesday: mountain areas of Chihuahua, Durango, State of Mexico, Tlaxcala, Puebla and Veracruz.
