October weather forecast
Macapá, Brazil

October in Macapá experiences a gradual return to the wetter weather. Despite this, the city still enjoys many sunny days further influenced by the stable sea temperature. The rise in wind velocity brings a refreshing change, with speeds increasing to a maximum of 20.1km/h (12.5mph). The daylight period remains unchanged, making it suitable for all kinds of outdoor activities.

Temperature

In Macapá, the warmest months are October and November, registering an average high-temperature of 32.5°C (90.5°F).

Heat index

October's average heat index is evaluated at a blistering 43°C (109.4°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. 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. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The months with the lowest humidity are October and November, with an average relative humidity of 72%.

Rainfall

In October, in Macapá, the rain falls for 11.5 days. Throughout October, 41mm (1.61") of precipitation is accumulated. In Macapá, during the entire year, the rain falls for 280.7 days and collects up to 2496mm (98.27") of precipitation.

Sea temperature

In October, the average sea temperature is 28.1°C (82.6°F).
Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is seen as very warm and delightful by everyone. During these temperatures, water activities become enjoyable, without causing discomfort for extended periods.

Daylight

In October, the average length of the day in Macapá is 12h and 7min.
On the first day of the month, sunrise is at 06:10 and sunset at 18:17. On the last day of October, in Macapá, sunrise is at 06:04 and sunset at 18:11 -03.

Sunshine

In Macapá, Brazil, the average sunshine in October is 8.7h.

UV index

The months with the highest UV index in Macapá are May through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 7 in October leads to these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Watch out! Reflections from sand and water can surge UV radiation exposure.