Climate Overview
Cancun features a tropical wet-and-dry climate characterized by two primary seasons: a pleasant, relatively dry winter (November to April) and a hot, humid, and rainy summer (May to October). The proximity to the Caribbean Sea acts as a natural thermostat, preventing extreme temperature shifts; however, the high humidity often makes the air feel significantly warmer than the mercury suggests.
Seasonal Trends
The Dry Season (November – April)
This is the most stable period for weather in the region. Temperatures are comfortable, with daily highs averaging between 81°F and 86°F (27°C–30°C).
- Winter (December – February): This is the coolest time of year. While days are mostly sunny, a phenomenon known as "El Norte"—cool winds from the north—can temporarily drop temperatures and cause choppier seas. Locals often wear light layers in the evenings when temperatures can dip to 67°F (19°C).
- Spring (March – April): Typically the driest months, March and April offer the lowest humidity and the most consistent sunshine (averaging 10 hours per day). This is widely considered the peak for outdoor exploration and clear-water activities.
The Wet Season (May – October)
This season is defined by rising temperatures and a significant increase in moisture. Highs often reach 93°F (34°C).
- Early Summer (May – June): These are often the hottest and most sweltering months. Humidity regularly hovers around 80%, creating a "heavy" air quality.
- Peak Rain (September – October): These are the wettest months. Rain usually arrives in short, intense bursts rather than day-long deluges. One curious local phenomenon is the microclimate variation: it is common for a downpour to occur in downtown Cancun while the Hotel Zone, just a few miles away, remains completely sun-drenched.
Hurricane and Storm Context
The Atlantic hurricane season officially runs from June through November, with the highest activity typically occurring in September and October. While direct strikes are statistically rare—occurring roughly once every 12 years—the region frequently experiences "brushes" from passing tropical storms, which can bring a few days of heavy wind and gray skies.
The "Feel" of Cancun
- Sea Temperature: One of Cancun’s most distinctive features is its "bathtub warm" water. Sea temperatures rarely drop below 78°F (25°C) in winter and can hit 84°F (29°C) in late summer, making swimming comfortable year-round.
- Humidity Impact: During the wet season, the high dew point means the heat index can make 90°F feel like 105°F. Conversely, the constant Caribbean sea breeze provides a refreshing reprieve, particularly along the eastern coastline of the Hotel Zone.
Local Perspective and Adaptation
Locals have adapted to the climate through architecture and lifestyle. High ceilings and white-washed walls are common to deflect heat, and many residents prioritize ventilation over sealed air conditioning when the breeze is favorable. During the hurricane season, a culture of "preventative preparedness" is ingrained; residents closely monitor weather charts and understand the rapid transition from a sunny afternoon to a tropical thunderstorm. Businesses often view the rainy season as a "lush" period, as the surrounding Mayan jungle becomes its most vibrant and green.