September weather forecast
Riohacha, Colombia

As the year advances forward to September in Riohacha, Colombia, there is a significant increase in rainfall, hitting a high of 116mm (4.57") for the year. The temperature remains stable, in line with the preceding months. The daylight reduces to 12.2 hours while the sunshine hours fall slightly. Humidity levels rise, making September the most humid month of the year on average. Owing to the increasing humidity and rainfall, activities tend to be more indoor-oriented during September.

Temperature

The transition from August to September brings an average high-temperature of a still tropical 33.4°C (92.1°F), barely different from August's 34.8°C (94.6°F). An average nighttime temperature of 24.4°C (75.9°F) is noted during the month of September.

Heat index

In September, the average heat index is evaluated at a blazing hot 48°C (118.4°F). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In Riohacha, the average relative humidity in September is 76%.

Rainfall

In September, in Riohacha, Colombia, the rain falls for 9 days. Throughout September, 116mm (4.57") of precipitation is accumulated. In Riohacha, during the entire year, the rain falls for 49 days and collects up to 546mm (21.5") of precipitation.

Daylight

In September, the average length of the day in Riohacha, Colombia, is 12h and 11min.
On the first day of the month, sunrise is at 05:41 and sunset at 18:01. On the last day of September, in Riohacha, sunrise is at 05:40 and sunset at 17:42 -05.

Sunshine

In Riohacha, the average sunshine in September is 6.6h.