September weather forecast
Playa del Carmen, Mexico

September welcomes the start of the fall season in Playa del Carmen, bringing with it a slight reduction in temperature. However, the sea temperature retains its warmth at 29°C (84.2°F), inviting those interested in a variety of water activities. An uptick in cloud cover and rainfall is also expected, with a recorded rainfall amount of 130mm (5.12"). Despite the increase in rainfall, the longest sunshine durations are observed during this month, offering a balanced mix of weather conditions. The winds remain moderate, maintaining a pleasant and comfortable atmosphere throughout September.

Temperature

Playa del Carmen records an average high-temperature of a still hot 30.5°C (86.9°F) in September, maintaining a close correlation with August's 31.1°C (88°F). Playa del Carmen's nighttime temperatures in September see a subtle dip to an average of 26.5°C (79.7°F).

Heat index

The heat index for September is computed to be a torrid 39°C (102.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in September in Playa del Carmen is 78%.

Rainfall

In September, in Playa del Carmen, the rain falls for 24.8 days. Throughout September, 130mm (5.12") of precipitation is accumulated. Throughout the year, in Playa del Carmen, there are 227.4 rainfall days, and 1021mm (40.2") of precipitation is accumulated.

Sea temperature

August through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

The average length of the day in September in Playa del Carmen is 12h and 15min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:03 pm. On the last day of September, sunrise is at 6:39 am and sunset at 6:36 pm EST.

Sunshine

In Playa del Carmen, Mexico, the average sunshine in September is 9h.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index in Playa del Carmen. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Attention! UV strength is notably upped by the reflection of sand and water.