March weather forecast
Manaus, Brazil

Marking the end of the first quarter of the year, March in Manaus experiences the highest recorded rainfall of 335mm (13.19") spanning over 20 days of the month. While the weather becomes cloudier and rainier, it does not lose its warm temperature appeal. Tourists find the tropical rainforest climate enriching, and frequently organized excursions go ahead despite the rain. Rare orchids, parrots, and other tropical species continue to bloom during this wet season. Despite the rain, the city maintains its charm and allure.

Temperature

The shift into March finds Manaus at an average high-temperature of a still hot 30.6°C (87.1°F), closely comparable to February's conditions. Manaus records a consistent low-temperature of 23.2°C (73.8°F) during March nights.

Heat index

In March, the average heat index is calculated to be an extremely hot 42°C (107.6°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The most humid month is March, with an average relative humidity of 88%.

Rainfall

The month with the most rainfall is March, when the rain falls for 20 days and typically aggregates up to 335mm (13.19") of precipitation.

Daylight

The average length of the day in March in Manaus, Brazil, is 12h and 8min.
On the first day of March in Manaus, Brazil, sunrise is at 06:07 and sunset at 18:17. On the last day of the month, sunrise is at 06:01 and sunset at 18:06 -04.

Sunshine

The average sunshine in March in Manaus, Brazil, is 3.2h.

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 12 in March, converts into the following recommendations:
Undertake all critical precautions. Protection from sun harm is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Sunscreen of at least SPF 30 should be applied generously and reapplied often on overcast days, especially post swim or outdoor exercise.