If Mérida is your destination, you can expect to give your air conditioner a good workout for most of the year. Sitting in the northwest corner of the Yucatán Peninsula, Mérida is hot pretty much year-round with moderate to high humidity. It is most often a few degrees hotter in Mérida than in neighboring coastal areas due to its inland location and low elevation.
Throughout the year, the temperature normally ranges between 63 F and 97 F. The low temperature rarely drops below the mid-50s or soars above 103 F. The average high temperature in January is just above 87 F and the average low for that time of year is 63 F. During Mérida’s hot and rainy summer, the average high in July is 95 F and the low averages just over 75 F. May is the city’s hottest month with an average high of 97 F and a low of 71 F.
Like most of Mexico, summer is the rainy season in Mérida. June through October rainfall accounts for about 80 percent of the city’s 40 inches of annual precipitation. Predictably, humidity is high during the rainy season, but generally does not rise above 76 percent.
Mérida begins to dry out in November and temperatures moderate through February before heading into the 90s again in March. The highest daily average wind speed is 12 mph in May, while the lowest daily average is 6 mph in September.
Because of its proximity to the Gulf of Mexico, Mérida is touched by a hurricane about every four years. Hurricane season is June through October. Hurricane Wilma in 2005 was the last hurricane to directly strike Mérida.
And like most of Mexico, Mérida can experience earthquakes from time to time.