Cancún weather: climate is not a daily forecast
Cancún weather varies enough that a monthly climate table and a forecast answer different questions. Climate normals help you compare the background for different travel months. A particular afternoon's rain, sea conditions and boat departures require current information instead. Use the figures here for the first decision, then current forecasts and local operating information for the day itself.
The table uses only SMN station 23155 CANCUN in Benito Juárez, Quintana Roo. Its normal period is 1991 to 2020, issued on 30 October 2026. The monthly maximum and minimum temperatures are averages of daily highs and lows, not records. The station sheet has 28 to 29 data years in each monthly column, rather than an uninterrupted thirty-year observation record.
Monthly temperature and rainfall normals
Read rainfall as a monthly total in millimetres and temperatures as degrees Celsius. A lower rainfall normal is a useful comparison, not a promise of dry days. The annual row reproduces the station's original annual values; it is not a new calculation from the monthly rows. For choosing dates around specific activities, use the separate best time to visit Cancún guide.
| Month | Mean daily high °C | Mean daily low °C | Rainfall mm |
|---|---|---|---|
| January | 28.7 | 20.0 | 103.8 |
| February | 30.1 | 20.6 | 59.3 |
| March | 31.5 | 21.4 | 38.7 |
| April | 33.1 | 22.9 | 42.3 |
| May | 34.2 | 24.2 | 87.0 |
| June | 34.0 | 24.9 | 184.4 |
| July | 34.8 | 25.0 | 67.0 |
| August | 35.1 | 25.0 | 102.2 |
| September | 34.2 | 24.6 | 181.5 |
| October | 32.2 | 23.7 | 277.1 |
| November | 30.3 | 22.3 | 131.4 |
| December | 29.4 | 21.0 | 96.6 |
| Year, original annual values | 32.3 | 23.0 | 1,371.3 |
Our pick: a water activity
Our take: A guided speedboat and snorkeling outing fits a water-focused day, but the weather can affect activities.
Hand-picked tours, booked through Viator. Prices are indicative starting prices in US dollars (as of November 2026). Tap a tour for live availability and the current price in your currency.
A weather-dependent speedboat and snorkeling outing
This water activity illustrates why conditions matter: equipment, a bilingual guide and a light regional snack are included, while operation depends on the day's weather and harbour decisions.
What the rainfall pattern means for planning
February to April are relatively low-rainfall months in this station series. That is an editorial reading of the normals, not a dry-weather guarantee. March has the lowest rainfall figure in the table. October has a much higher normal, and June is also notably wetter. July's lower value should not be read as a guaranteed rain-free break in summer.
Monthly totals also do not tell you how rainfall will be distributed across your stay. Avoid turning a normal into a schedule such as guaranteed afternoon showers or a fixed daily dry window. Leave some flexibility between a sea outing and a land-based visit. You can compare possible alternatives on the things to do page without treating any activity as immune to severe weather.
Hurricane season and November planning
The Atlantic hurricane season runs from 1 June to 30 November. Activity can occur outside these dates. November therefore should not be presented as an all-clear month, and the end of the calendar season does not make every December departure certain. The seasonal window is a framework for awareness, not a prediction that a storm will affect your visit.
For a trip during that window, follow current weather information and local instructions rather than using the temperature table as a safety assessment. Separate the decision to travel in a season from the decision to enter the water or board a boat on a particular day. Warm monthly temperatures do not resolve currents, wind or harbour restrictions.
Boats, beach flags and sargassum
Harbour operating decisions can distinguish vessel sizes and types of activity. A small-boat restriction does not automatically cancel all passenger ferries. Similarly, an excursion shown as available to book is not a report on present sea conditions. The speedboat and snorkeling outing meets in the Hotel Zone at kilometre 16.261 and includes snorkeling equipment, a bilingual guide and a regional snack; it is a practical example of a weather-dependent activity, not a promise of all-weather operation.
On the beach, follow the flag and lifeguards. Red means no entry into the sea. A Blue Flag quality designation is not the day's swimming permission. Sargassum is another separate question: conditions differ between beaches and years, and a low-rainfall month does not guarantee a clear shoreline. The beach guide covers access, flags and this seasonal context in more detail.
Weather questions
Is the climate table a forecast for my dates?
It shows historical climate normals for 1991 to 2020, issued in October 2026. Use a current forecast for your visit. Average highs and lows are not record temperatures or a prediction of each day's conditions.
Which months are relatively drier?
February to April have relatively low rainfall in this station series, with March the lowest table month. Rain can still affect a stay in those months, so retain some flexibility for outdoor activities.
Does a harbour restriction stop every boat?
Restrictions can apply to particular vessel sizes. Check the actual activity and departure rather than assuming a small-boat restriction means all ferries have stopped. Change and refund terms belong to the selected product.