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, a minimum of 25.5°C, along with the highest annual rainfall quantity of 137mm 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 brings with it an average high-temperature of a warm 29.4°C, showing a negligible variation from the month before. Night temperatures during October stabilize at an average of 25.5°C, closely mirroring the daytime temperatures.

Heat index

October's heat index is evaluated at a sweltering 35°C. Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

October is the month with the most rainfall. Rain falls for 23.3 days and accumulates 137mm of precipitation.

Sea temperature

In October, the average sea temperature is 28.6°C.
Note: Surface water temperatures ranging from 25°C to 29°C are considered superb and highly pleasant for water activities over extended periods.

Daylight

In Cancún, Mexico, 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 6:35 pm. On the last day of October, sunrise is at 6:49 am and sunset at 6:12 pm EST.

Sunshine

The average sunshine in October in Cancún is 8.5h.

UV index

The months with the highest UV index in Cancún, Mexico, are March through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 7 in October leads to these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.