September weather forecastBacabal, Brazil

Weather in September

September, the first month of the spring in Bacabal, is a very hot month, with an average temperature varying between 35.5°C (95.9°F) and 22.1°C (71.8°F).

Temperature

Bacabal in September witnesses an average high-temperature of a torrid 35.5°C (95.9°F), indicating a slight variation from August's 34.1°C (93.4°F). September nights bring a pronounced temperature shift, with averages hovering around a pleasant 22.1°C (71.8°F).

Heat index

The heat index in September is evaluated at a blazing hot 48°C (118.4°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to 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.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. 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 gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

With an average relative humidity of 62%, September is the least humid month.

Rainfall

In Bacabal, in September, during 9.5 rainfall days, 11mm (0.43") of precipitation is typically accumulated. In Bacabal, during the entire year, the rain falls for 252.6 days and collects up to 1329mm (52.32") of precipitation.

Daylight

In September, the average length of the day in Bacabal is 12h and 5min.
On the first day of the month, sunrise is at 05:57 and sunset at 18:00. On the last day of September, in Bacabal, sunrise is at 05:44 and sunset at 17:53 -03.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The months with the highest UV index in Bacabal are May, July through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious.