September weather forecast
Tlapacoyan, Mexico

The first month of the autumn, September, is still a warm month in Tlapacoyan, Mexico, with an average temperature varying between 29.4°C (84.9°F) and 20.4°C (68.7°F).

Temperature

Tlapacoyan's average high-temperature in September is a moderately hot 29.4°C (84.9°F), marking an insignificant difference from the 30.6°C (87.1°F) of August. During September, an average low-temperature of 20.4°C (68.7°F) is observed in Tlapacoyan.

Heat index

September's heat index is evaluated at a very hot 35°C (95°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Note that heat index values are valued for light wind and location in the shade. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In September, the average relative humidity in Tlapacoyan is 78%.

Rainfall

In Tlapacoyan, in September, it is raining for 22.5 days, with typically 86mm (3.39") of accumulated precipitation. Throughout the year, in Tlapacoyan, there are 167.5 rainfall days, and 636mm (25.04") of precipitation is accumulated.

Daylight

In Tlapacoyan, the average length of the day in September is 12h and 15min.
On the first day of September, sunrise is at 6:13 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 6:17 pm CST.

Sunshine

The average sunshine in September in Tlapacoyan is 8.9h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.