, the first month of the autumn in San Fernando de Apure
, is still a tropical month, with an average temperature fluctuating between 23.6°C (74.5°F) and 31.2°C (88.2°F).
In September, the average high-temperature is almost the same as in August
- a still hot 31.2°C (88.2°F). The average low-temperature, in September, is 23.6°C (74.5°F).
The average heat index in September is evaluated at a blistering 42°C (107.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.Note
: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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.
The average relative humidity in September in San Fernando de Apure is 81%.
In San Fernando de Apure, during September, the rain falls for 16 days and regularly aggregates up to 172mm (6.77") of precipitation. Throughout the year, there are 121 rainfall days, and 1349mm (53.11") of precipitation is accumulated.
The average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:37. On the last day of September, in San Fernando de Apure, sunrise is at 06:18 and sunset at 18:21 -04.
The average sunshine in September in San Fernando de Apure is 6.8h.