September weather forecast
Cacalchén, Mexico

The first month of the autumn, September, is also a hot month in Cacalchén, Mexico, with temperature in the range of an average high of 33.8°C (92.8°F) and an average low of 23.3°C (73.9°F).

Temperature

The start of September marks an average high-temperature of a tropical 33.8°C (92.8°F), hardly distinguishable from the conditions in August. An average low-temperature of 23.3°C (73.9°F) marks the nights throughout September.

Heat index

For September, the heat index is evaluated at a burning hot 50°C (122°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', arises from combining readings of air temperature and relative moisture content. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to 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.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

September and October, with an average relative humidity of 78%, are the most humid months in Cacalchén, Mexico.

Rainfall

In Cacalchén, in September, it is raining for 21 days, with typically 77mm (3.03") of accumulated precipitation. Throughout the year, there are 167.9 rainfall days, and 542mm (21.34") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 16min.
On the first day of the month, sunrise is at 5:40 am and sunset at 6:12 pm. On the last day of September, in Cacalchén, sunrise is at 5:47 am and sunset at 5:45 pm CST.

Sunshine

In September, the average sunshine is 9.2h.

UV index

The months with the highest UV index in Cacalchén are February through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In September, the UV index of 7 transforms into the following advice:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.