When will Mexico’s cold-front season begin? Here’s what is known

Mexico is preparing for a colder season, with the National Meteorological Service set to begin monitoring the 2026-2027 cold-front season in September. The season will run through May next year, and authorities forecast at least 56 cold fronts across the country, more than in recent years.

The monthly forecast calls for three fronts in September, seven in October, eight in November, nine in December, eight in January, seven in February, six in March, six in April and two in May. December and January are expected to be the coldest months.

Fabián Vázquez Romaña, the service’s general coordinator, said the outlook also takes into account atmospheric factors including the strengthening El Niño phenomenon and the presence of cyclones during the current rainy season. Authorities warned that cold air masses from Canada and the United States could interact with abundant moisture and produce winter storms in northwestern Mexico.

Residents are advised to dress in layers and cover their faces, heads, hands and ears. Officials also recommend consuming nutritious food and hot drinks, covering the nose and mouth when leaving warm places, and inspecting homes and heating systems.

Protection authorities warned people not to use braziers, ovens or stoves to heat rooms, and not to sleep near heaters. Burning fuel in enclosed spaces can produce carbon monoxide, an invisible and potentially deadly toxic gas. Officials urged residents to rely only on forecasts and alerts issued by local authorities.

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According to the forecast, three frontal systems are expected to arrive in Mexico in September, seven in October, eight in November, nine in December, eight in January, seven in February, six in March, six in April and two in May.