September weather forecast
Chumatlan, Mexico

The first month of the autumn, September, is still a hot month in Chumatlan, Mexico, with temperature in the range of an average low of 21.6°C (70.9°F) and an average high of 30.5°C (86.9°F).

Temperature

Chumatlan greets September with an average high-temperature of a still hot 30.5°C (86.9°F), marking a slight deviation from the preceding month. Chumatlan experiences a mean temperature of 21.6°C (70.9°F) during September nights.

Heat index

Throughout September, the heat index is evaluated at an extremely hot 40°C (104°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In September, the average relative humidity is 81%.

Rainfall

In Chumatlan, Mexico, in September, during 23 rainfall days, 129mm (5.08") of precipitation is typically accumulated. Throughout the year, in Chumatlan, there are 196.2 rainfall days, and 978mm (38.5") of precipitation is accumulated.

Daylight

In Chumatlan, the average length of the day in September is 12h and 15min.
On the first day of the month, sunrise is at 6:14 am and sunset at 6:45 pm. On the last day of September, in Chumatlan, sunrise is at 6:21 am and sunset at 6:19 pm CST.

Sunshine

The average sunshine in September in Chumatlan is 8.4h.

UV index

In September, the average daily maximum UV index in Chumatlan is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: In September, a regular UV index of 6 translates into these guidelines:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.