October weather forecast
Cancún, Mexico

The weather in October brings a continuation of the downscaling trend in terms of temperatures while retaining relatively high humidity levels. October is the wettest month of the year, often seeing concurrent spells of rain showers, making it a potentially unfavorable option for outdoor-focused tourists. Despite the increased humidity, temperatures remain largely consistent with those of September. Cancún in October sees a maximum temperature of 29.4°C (84.9°F), a minimum of 25.5°C (77.9°F), along with the highest annual rainfall quantity of 137mm (5.39") covering nearly 23.3 days. As the city hovers between seasons, it's critical for potential visitors to keep track of ongoing weather conditions before confirming their plans.

Temperature

The onset of October in Cancún notes an average high-temperature of a warm 29.4°C (84.9°F), subtly shifted from September's 30.3°C (86.5°F). In October, Cancún's nights cool slightly to a consistent average temperature of 25.5°C (77.9°F).

Heat index

For most parts of October, the heat index is appraised at a fiery hot 35°C (95°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In October, the average relative humidity in Cancún is 77%.

Rainfall

The month with the most rainfall is October, when the rain falls for 23.3 days and typically aggregates up to 137mm (5.39") of precipitation.

Sea temperature

In October, the average sea temperature in Cancún is 28.6°C (83.5°F).
Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is seen as very warm and delightful by everyone. During these temperatures, water activities become enjoyable, without causing discomfort for extended periods.

Daylight

The average length of the day in October is 11h and 39min.
On the first day of the month, sunrise is at 6:38 am and sunset at 6:34 pm. On the last day of October, sunrise is at 6:50 am and sunset at 6:11 pm EST.

Sunshine

The average sunshine in October in Cancún is 8.5h.

UV index

The months with the highest UV index are March through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 7 during October translates into these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.