September weather forecast
Tepalcatepec, Mexico

September, the first month of the autumn in Tepalcatepec, is still a hot month, with an average temperature ranging between min 19°C (66.2°F) and max 32.5°C (90.5°F).

Temperature

The shift into September finds Tepalcatepec at an average high-temperature of a still tropical 32.5°C (90.5°F), closely comparable to August's conditions. September nights in Tepalcatepec are characterized by a significant departure from the daytime highs, dropping to an average temperature of 19°C (66.2°F).

Heat index

The heat index value during September is evaluated at a blisteringly hot 42°C (107.6°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

September is the most humid month, with an average relative humidity of 70%.

Rainfall

In Tepalcatepec, in September, it is raining for 19.5 days, with typically 71mm (2.8") of accumulated precipitation. Throughout the year, in Tepalcatepec, there are 118.8 rainfall days, and 432mm (17.01") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:05 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:40 pm CST.

Sunshine

The average sunshine in September is 9.3h.

UV index

January, February, June through December, with an average maximum UV index of 6, are months with the lowest UV index in Tepalcatepec. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, a regular UV index of 6 translates into these guidelines:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.