How we know: Sources are listed at the end. Weather figures are official climate normals; hurricane-season dates come from NOAA; entry and route facts come from the cited travel-guide and airport pages. Wildly does not publish fare averages in prose; live prices are on the linked route pages.
Mexico is big enough that there is no single best month. The Caribbean coast, the Pacific coast, the high central plateau and the Oaxaca valleys each have their own calendar, and they share only two things: a dry season that runs roughly November to April, and a rainy season from roughly May or June to October that also happens to be hurricane season on both coasts. For most trips the sweet spot is late November to early December, or mid-January to early March, when the weather is dry everywhere and the Christmas and spring-break peaks are out of the way.
Cancún weather by month
Official 1991–2020 climate normals for Cancún, from Mexico's Servicio Meteorológico Nacional:
| Month | Avg high | Avg low | Rain | |---|---|---|---| | January | 83°F (28°C) | 67°F (19°C) | 2.2 in | | February | 85°F (29°C) | 67°F (20°C) | 1.7 in | | March | 87°F (31°C) | 69°F (21°C) | 1.8 in | | April | 90°F (32°C) | 72°F (22°C) | 1.5 in | | May | 92°F (33°C) | 75°F (24°C) | 3.3 in | | June | 92°F (34°C) | 76°F (25°C) | 5.7 in | | July | 93°F (34°C) | 76°F (24°C) | 4.4 in | | August | 94°F (34°C) | 76°F (24°C) | 4.5 in | | September | 92°F (33°C) | 75°F (24°C) | 8.8 in | | October | 89°F (32°C) | 74°F (23°C) | 9.5 in | | November | 86°F (30°C) | 71°F (22°C) | 4.4 in | | December | 84°F (29°C) | 68°F (20°C) | 3.1 in |
December through April is the dry season on the Yucatán coast; September and October are by far the wettest months and sit at the peak of hurricane season. Wikivoyage notes April is "already the hottest month, especially at the coast and on the Yucatán peninsula," and the normals bear that out inland too.
Hurricane season
NOAA's National Hurricane Center defines the Atlantic season, which covers the Caribbean and Gulf coasts (Cancún, Riviera Maya, Cozumel, Veracruz), as June 1 to November 30, with the peak on September 10 and most activity between mid-August and mid-October. The Eastern Pacific season, which covers Los Cabos, Puerto Vallarta, Mazatlán and the Oaxaca coast, runs May 15 to November 30 with a less pronounced peak in late August.
In practice most rainy-season days on either coast are sunny mornings and afternoon storms, and resorts price accordingly. The months to be genuinely cautious about are September and October; if you book then, buy insurance that covers weather cancellation.
Region by region
Yucatán and the Caribbean coast (Cancún, Playa del Carmen, Tulum, Cozumel). Best from December to April: dry, warm, breezy. Sargassum seaweed tends to be heaviest from spring through summer, though it varies year to year. Peak demand is Christmas–New Year and US spring break (March into early April). May and early June are hot but dry and quieter; late summer and autumn are cheapest and wettest.
Pacific coast (Puerto Vallarta, Los Cabos, Mazatlán, Huatulco). Dry and pleasant from November to April; summer is hot, humid and wet from June to September, with the heaviest rain in the Vallarta–Nayarit stretch. Los Cabos, at the desert tip of Baja, is much drier than Vallarta and is the better summer bet on the Pacific side. Whale-watching in Baja and Banderas Bay is a winter activity.
Mexico City and the central highlands (Guanajuato, San Miguel de Allende, Puebla). At 7,300 ft, the capital is spring-like all year: 1991–2020 normals show highs of 72–82°F every month, with cold nights in December and January (lows around 47°F) and a rainy season from June to September that brings heavy afternoon downpours. The driest, clearest months are November to March; April and May are the warmest and haziest.
Oaxaca. Similar rhythm to the highlands with a hotter, drier winter and a rainy season from June to September. Two dates drive demand: the Guelaguetza dance festival in late July, and Day of the Dead on November 1–2, when the city's hotels fill months ahead. Early November after the festivities, and January–February, are the calm windows.
Holiday peaks to know
Mexican domestic travel surges during Semana Santa (Holy Week, the week before Easter), Day of the Dead (November 1–2) and Christmas through New Year, when Wikivoyage notes schools and businesses close and beach towns fill (Wikivoyage, "Holidays"). Layer on US spring break and Thanksgiving and you get the expensive windows for beach flights: mid-December to early January, and roughly the first three weeks of March through Easter.
Getting there from the US
Cancún (CUN) is the busiest airport in Mexico and in Latin America for international passengers, and its destinations table reads like a map of the US: American, Delta and United each list eight or more year-round US cities plus seasonal winter additions, Southwest lists a dozen, and Frontier, Spirit, JetBlue, Alaska and Sun Country add more. Mexico City (MEX), Guadalajara (GDL), Los Cabos (SJD) and Puerto Vallarta (PVR) all have nonstops from the major US hubs on the US carriers plus Aeroméxico and Volaris.
Flight times are short: about 2 hours from Miami to Cancún, 3.5 from Chicago or New York, and 3 from Los Angeles to Mexico City or Cabo. For today's prices see Chicago to Cancún, JFK to Cancún, LAX to Mexico City and Dallas to Puerto Vallarta. Midwesterners can read the Chicago to Cancún flight guide for airline and airport choice.
When fares tend to be lowest
Beach routes run on the US holiday calendar. Demand, and therefore published fares, is highest from Christmas through spring break and again around Thanksgiving; US carriers add seasonal winter capacity to Cancún and Cabo specifically for it. Late April to early June and September to early November are the quiet months, and they coincide with the hot or rainy season, which is the trade-off. Mexico City is less seasonal because business travel and the city's mild climate spread demand across the year.
That is a demand-calendar argument, not a price forecast. Fares on any specific route depend on capacity and competition, so pick your window, check the route page for what it is actually pricing today, and set a price alert with a target you would be happy to pay. Wildly checks the route daily and emails you when the fare drops.
Entry requirements for US citizens
US citizens do not need a visa for tourist stays of up to 180 days, but do need a valid passport; on arrival you complete the Forma Migratoria Múltiple (FMM, tourist card), which for air passengers is generally covered in the ticket price (Wikivoyage, "Get in"). Immigration officers set the permitted stay and may grant fewer than 180 days, so check the stamp or form before you leave the desk. Several airports now process the FMM digitally, and requirements change, so confirm with the Mexican consulate before travel.
FAQ
When is the best time to visit Cancún? December to April for dry weather; late January to February for the best combination of weather and post-holiday calm. Avoid September–October if a washout would ruin the trip.
Is it safe to travel to Mexico during hurricane season? Most days are fine, and resorts operate normally, but September and October carry real cancellation risk on both coasts. Travel with weather-inclusive insurance and flexible tickets.
What is the best month for Mexico City? November through March: dry, clear and cool at night. Day of the Dead (November 1–2) is spectacular but crowded; the following two weeks are ideal.
How hot does Oaxaca get? Oaxaca's warmest months are April and May, before the rains. Winter days are warm and nights cool. The famous festivals, Guelaguetza in July and Day of the Dead in November, fall in the pleasant months but are the busiest.
Do I need a visa for Mexico? No, for tourist stays up to 180 days on a US passport. Keep your FMM or digital entry record until you leave (Wikivoyage).
Sources
- Cancún climate normals 1991–2020 (Servicio Meteorológico Nacional, via Wikipedia)
- Mexico City climate normals 1991–2020 (Servicio Meteorológico Nacional, via Wikipedia)
- NOAA National Hurricane Center: Tropical Cyclone Climatology
- Wikivoyage: Mexico — Get in, Climate and Holidays
- Cancún International Airport — Airlines and destinations (Wikipedia)