September weather forecastBacalar, Mexico

Weather in September

September, the first month of the autumn in Bacalar, is still a tropical month, with temperature in the range of an average high of 31.5°C (88.7°F) and an average low of 24.4°C (75.9°F).

Temperature

The shift from August to September is characterized by an average high-temperature of a still hot 31.5°C (88.7°F), not significantly different from the 31.8°C (89.2°F) of August. In September, Bacalar encounters an average low-temperature of 24.4°C (75.9°F) during the night.

Heat index

The heat index value for September is calculated to be an extremely hot 43°C (109.4°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Bacalar, in September, it is raining for 23.1 days, with typically 96mm (3.78") of accumulated precipitation. Throughout the year, in Bacalar, there are 198.4 rainfall days, and 752mm (29.61") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September in Bacalar, sunrise is at 6:38 am and sunset at 7:07 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:42 pm EST.

Sunshine

The average sunshine in September is 8.5h.

UV index

The months with the highest UV index in Bacalar are March through July and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum daily UV index of 7 during September morphs into the following directions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.