Weather in Mexico City: Climate, Seasons, and Average Monthly Temperature

Although Mexico City is located within the tropics, its elevation of 7,350 feet makes for fairly pleasant weather year-round. However, summers are rainy and during the winter, it can get quite chilly, especially at night. The annual average temperature is 64 degrees F (18 degrees C). Temperature variations from season to season are relatively minor, but May and June are the hottest months, and January is the coldest, with a fairly wide temperature range between day and night, sometimes dropping close to freezing at night.

Fast Climate Facts

• Hottest Months: April and May (81 F - average high)
• Coldest Month: January (72 F - average high)
• Wettest Month: July (5.4 inches)
• Windiest Month: June (7 mph)

Rainy Season

Rainy season in Mexico City lasts from May through September. The vast majority of Mexico City's annual average rainfall of 30 to 34 inches falls during these months. During this time, you can expect afternoon or evening showers or thunderstorms, and occasionally even hail storms. The rain is usually brief but can be intense. Sometimes it rains very hard for a short period of time, and the roads become flooded, making Mexico City’s already notorious traffic even worse. The rain doesn’t usually last all day and the sun comes out for some of the time. Only in the case of a hurricane or tropical storm along the coast, there may be full days of overcast and rainy weather.

Air Quality 

Due to its massive population, high elevation and location in a large valley surrounded by mountains on three sides, air pollution in Mexico City can be a problem. Oxygen levels at this altitude inhibit complete fuel combustion in engines, causing higher emissions of carbon monoxide and other compounds. A few climate factors affect air quality on a day-to-day and seasonal basis, including wind, rain, and sunshine. In general, air quality in Mexico City is worse at the end of the winter, in particular, the months of February and March. Besides seasonal differences, there is a daily variation in air quality, with the highest rates of pollution during the morning rush hour. If you have respiratory ailments, it may be best to remain indoors during this time of day. Check the real-time air quality index for up-to-date information.

Spring in Mexico City

The weather warms up during the springtime, especially during the day, and there’s a lot more sunshine than other times of the year. Daytime temperatures may reach 80 degrees F (27 degrees C) in the afternoon. The temperature drops at night, however, and it can still be a bit cold. 

What to pack: In the springtime, it’s all about layers. During the day, you’ll probably be comfortable with light pants and a T-shirt. Pack a hat if you'll be out walking for extended periods during the day. Be sure to carry a warm sweater or jacket for the evening. If you're coming at the end of the season, bring an umbrella or light rain jacket with a hood as the rains begin in May, although there are far fewer rainy days than in the summer.

Summer in Mexico City

June to September is the wettest time of year, and it may rain every day, although usually only for part of the day (mainly in the afternoons and evenings). Temperatures are generally milder than other times of the year, with less extreme changes in temperature from day to night. Daytime temperatures are similar to those experienced in the winter season, while nights are cool, but not cold.

What to pack:​ a sturdy raincoat with a hood is your best bet in case you get caught in a shower or storm. Rain is often accompanied by strong winds making umbrellas impractical. You may want to consider waterproof footwear or bringing an extra pair of shoes (as well as socks) in case your feet get soaked.

Fall in Mexico City

Fall is a pleasant season in Mexico City. There is still some rain in September, and the final rains of the year usually fall in October, but unless there’s a hurricane along the coast, which can bring overcast and rainy days, it’s much drier than the summer months. The temperatures are usually mild, although towards the end of November you’ll begin to feel a chill, particularly during the nighttime. 

What to pack: Don't forget to pack a sweater as the temperature can get cooler in the evenings, and bring a light waterproof jacket or windbreaker.

Winter in Mexico City

The winter months see cold nights with generally pleasant daytime temperatures. It can drop to freezing during the night and since Mexico City buildings are lacking central heating and most have poor or no insulation, you will feel the cold indoors as well. It rarely rains this time of year, and days can be sunny and clear. As long as you’re prepared to bundle up, it’s not a bad time to visit.

What to pack: If you’re visiting in winter, pack warm clothes along with some lighter layers because it can still get warm during the day. Wooly socks and sweaters, even a scarf and gloves may come in handy for mornings and evenings, though you may find that short sleeves are fine for the afternoon.