September weather forecast
Arraial do Cabo, Brazil

September in Arraial do Cabo witnesses a rise in temperature, signaling the onset of spring. Visitors take advantage of this period before the high heats of summer begin. Outdoor pursuits are attractive options with rainfall levels gaining momentum from the winter months. As daylight hours steadily increase, nature enthusiasts frequently find themselves trekking through the local parks, appreciating the vibrant splashes of color springtime offers.

Temperature

Arraial do Cabo marks the onset of September with an average high-temperature of a still moderately hot 27.1°C (80.8°F), a subtle shift from August's 25.6°C (78.1°F). During September, Arraial do Cabo records a consistent average nighttime temperature of 19°C (66.2°F).

Heat index

For September, the heat index is computed to be a tropical 30°C (86°F). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.
Heat index specifics point out values are for conditions of shade and a slight breeze. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

In Arraial do Cabo, the average relative humidity in September is 81%.

Rainfall

In Arraial do Cabo, in September, 61mm (2.4") of precipitation is typically accumulated. During the entire year, Arraial do Cabo aggregates up to 771mm (30.35") of precipitation.

Sea temperature

The month with the coldest seawater is September, with an average sea temperature of 21.8°C (71.2°F).
Note: Swimming in 21.8°C (71.2°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In September, the average length of the day is 11h and 58min.
On the first day of September in Arraial do Cabo, sunrise is at 05:57 and sunset at 17:38. On the last day of the month, sunrise is at 05:28 and sunset at 17:46 -03.