October weather forecast
Puerto Vallarta, Mexico

October ushers in definitive changes. With the rainy season in its dying days, rainfall diminishes significantly, dropping to a manageable 114mm (4.49"). Temperatures follow a similar trend, thereby initiating the transition to the cooler months. Sea temperatures undergo a slight decline, cooling to 29.6°C (85.3°F), but still remaining perfect for water activities. October’s frequent sunny days manage to strongly retain Puerto Vallarta’s popular sunny beach destination status, despite the onset of autumnal coolness.

Temperature

Puerto Vallarta's transition from September to October introduces an average high-temperature of a still moderately hot 28.9°C (84°F), marking an insignificant variation from the 28.5°C (83.3°F). In Puerto Vallarta, October nights cool down to an average of 21.1°C (70°F).

Heat index

For most parts of October, the heat index is appraised at a very hot 35°C (95°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Understand that the heat index values take into account shaded locations and mild winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in October in Puerto Vallarta is 81%.

Rainfall

In Puerto Vallarta, Mexico, in October, during 20.9 rainfall days, 114mm (4.49") of precipitation is typically accumulated. Throughout the year, there are 153.3 rainfall days, and 735mm (28.94") of precipitation is accumulated.

Sea temperature

In October, the average sea temperature in Puerto Vallarta is 29.6°C (85.3°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

In October, the average length of the day in Puerto Vallarta is 11h and 40min.
On the first day of the month, sunrise is at 6:52 am and sunset at 6:48 pm. On the last day of October, in Puerto Vallarta, sunrise is at 7:03 am and sunset at 6:25 pm CST.

Sunshine

In October, the average sunshine is 9h.

UV index

The months with the highest UV index are January through November, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 6 in October transforms into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Caution! Sand and water surfaces escalate the UV intensity from the Sun.