September weather forecast
San Juan Evangelista, Mexico

September, the first month of the autumn in San Juan Evangelista, is still a hot month, with an average temperature ranging between min 22°C (71.6°F) and max 30.7°C (87.3°F).

Temperature

San Juan Evangelista's average high-temperature in September is a still tropical 30.7°C (87.3°F), indicating a subtle variation from August. An average low-temperature of 22°C (71.6°F) is recorded during the nights in September.

Heat index

For most parts of September, the heat index is evaluated at a blisteringly hot 42°C (107.6°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September is 86%.

Rainfall

In September, the rain falls for 26.8 days. Throughout September, 170mm (6.69") of precipitation is accumulated. In San Juan Evangelista, Mexico, during the entire year, the rain falls for 216.6 days and collects up to 1064mm (41.89") of precipitation.

Daylight

In September, the average length of the day in San Juan Evangelista is 12h and 14min.
On the first day of the month, sunrise is at 6:06 am and sunset at 6:34 pm. On the last day of September, in San Juan Evangelista, sunrise is at 6:10 am and sunset at 6:09 pm CST.

Sunshine

In San Juan Evangelista, the average sunshine in September is 7.5h.

UV index

In San Juan Evangelista, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 6 suggests these recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.