Cold front 17 will remain active during the first week of December, causing rains, winds up to 70 km/h, and minimum temperatures down to -10°C in various regions. At least 18 states will face freezing conditions, with frosts in mountainous areas. The National Meteorological Service warns of a record December with seven cold fronts.
The National Meteorological Service (SMN) reported that Cold Front 17 will cause heavy rains and winds with gusts up to 70 km/h in northern, northeastern, and eastern regions of Mexico during the first week of December. This frontal system, accompanied by a polar air mass, will create a cold to freezing environment in mornings and nights in the mountainous areas of the Northern Plateau and Central Plateau, with frosts at dawn in at least 10 states.
The front will move on Monday, December 1, over the eastern part of the country and remain semi-stationary in the northeast from Wednesday to Thursday, continuing with rains, winds, and temperature drops. The most affected states include Chihuahua and Durango with minima of -10 to -5°C; Baja California, Sonora, Zacatecas, Hidalgo, Mexico State, Tlaxcala, Puebla, and Veracruz with -5 to 0°C; and mountainous areas of Coahuila, Nuevo León, San Luis Potosí, Aguascalientes, Jalisco, Michoacán, Guanajuato, and Oaxaca with 0 to 5°C. Heavy rains are forecast in Baja California Sur, Sonora, Sinaloa, Chihuahua, and Durango, and showers in Coahuila, Oaxaca, Chiapas, and Veracruz.
For Monday, December 1, heavy rains are expected in Tamaulipas, Veracruz, and San Luis Potosí, with showers in Coahuila, Nuevo León, Querétaro, Hidalgo, and Puebla. Frosty nights will affect Baja California, Sonora, Zacatecas, Hidalgo, Mexico State, Tlaxcala, Puebla, Veracruz, and Oaxaca with -5 to 0°C, and Coahuila, Nuevo León, San Luis Potosí, Aguascalientes, Jalisco, Michoacán, Guanajuato, and Querétaro with 0 to 5°C.
Up to November 2025, 16 cold fronts have been recorded: four in September, seven in October, and five in November. The SMN estimates 48 for the 2025-2026 winter season, starting December 21, while the Secretariat of the Navy predicts up to 54. December will be the most active month with at least seven fronts, expecting extreme temperatures, snowfalls, frosts, heavy rains, and strong winds, increasing the risk of respiratory diseases. Authorities recommend dressing warmly, avoiding sudden temperature changes, and consuming fruits and vegetables to boost defenses.