Rainy Season Details and Timeline
According to Mexico’s National Weather Service (SMN) and the National Disaster Prevention Center (Cenapred), the rainy season in Mexico officially ends on November 30th. Consequently, the atmospheric conditions in the country will remain wet during October and November.
The rainy season commenced on May 15 in the Pacific Ocean and June 1 in the Atlantic Ocean. Moreover, rainfall was expected to exceed average levels in June.
Water Storage and Impact on Various Regions
From May through September, the country experienced consistent and favorable rainfall conditions. As a result, water reservoirs in numerous states have reached full capacity, with some even at 100% storage.
However, several cities and communities have suffered due to intense rainfall causing significant flooding, which has affected homes and infrastructure. This has led to the perception that the rainy season has lasted longer than usual.
Why Has the Rainy Season Lasted So Long?
Contrary to the belief that the rainy season is unusually prolonged, it’s actually a result of a meteorological phenomenon known as El Niño-La Niña neutral conditions. This has fostered an active season on both coasts, with increased frequency and proximity of tropical cyclones.
El Niño typically occurs in Mexico’s northwestern, northern regions, and slightly in the central areas. La Niña, on the other hand, is more common in the south-central region.
Looking ahead, the upcoming months may still witness intense rainfall events.
Key Questions and Answers
- Q: When does the rainy season in Mexico officially end? A: The rainy season in Mexico ends on November 30, as per the SMN and Cenapred.
- Q: What factors have contributed to the prolonged rainy season in 2025? A: The extended rainy season is primarily due to El Niño-La Niña neutral conditions, which have increased the frequency and proximity of tropical cyclones along Mexico’s coasts.
- Q: How have different regions been affected by the prolonged rainy season? A: While water storage has improved in many states, several cities and communities have experienced flooding, causing damage to homes and infrastructure.
- Q: What can we expect in the upcoming months regarding rainfall? A: Despite the official end of the rainy season, intense rainfall events may still occur in the following months.
