Mexico’s capital city has a spring-like climate year-round, a pleasant convergence of its latitude and elevation. Sitting on a tropical latitude but rising to an elevation of nearly 7,400 feet, Mexico City’s subtropical highland climate is mild throughout the year with few hot days or cold days.
Average high temperatures range from 72 F in January and December to 81 F in the warmest months of April and May. The coolest month of the year is January when the thermometer shows an average temperature of 43 F to start your day. If you like cool nights for sleeping, the average low in Mexico City seldom exceeds 57 F.
The city has seen extreme weather in the past, reaching an all-time record high of 93 F and a record low of 24 F.
Like most of Mexico, the rainy season begins in June and lasts until October. About 85 percent of the city’s annual precipitation of 33 inches falls during these five months. The wettest month typically is July when the average rainfall is 7.5 inches. December, January and February see an average of just .3 inches each month. Because of its elevation, hail often falls but snow is seldom seen. The two last recorded snowfalls were in 1967 and 1940.
The biggest climate issue in Mexico City is its air quality. The city sits in the very large Valley of Mexico at a high altitude and receives anti-cyclonic weather systems that produce little wind activity. Often, pollutants from industry and automobiles hang in the air for days.
Like most of Mexico, Mexico City also experiences earthquakes. Its most powerful earthquake struck in the early morning hours on September 19, 1985 with a magnitude of 8.0, one of the largest ever recorded in North America. Over 5,000 people lost their lives.
The city also can receive generous amounts of rain when a hurricane or severe tropical storm from either coast sideswipe the city.