March weather forecast
Santa Isabel do Rio Negro, Brazil

March, the first month of the autumn in Santa Isabel do Rio Negro, is still a hot month, with an average temperature varying between 30.7°C (87.3°F) and 22.6°C (72.7°F).

Temperature

The commencement of March introduces an average high-temperature of a still tropical 30.7°C (87.3°F), closely mirroring the preceding month. During March, the temperature tends to dip to an average of 22.6°C (72.7°F) at night.

Heat index

March's heat index is estimated at a scorching 42°C (107.6°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In March, the average relative humidity is 87%.

Rainfall

In Santa Isabel do Rio Negro, in March, during 27.5 rainfall days, 199mm (7.83") of precipitation is typically accumulated. In Santa Isabel do Rio Negro, during the entire year, the rain falls for 308 days and collects up to 1836mm (72.28") of precipitation.

Daylight

The average length of the day in March in Santa Isabel do Rio Negro is 12h and 7min.
On the first day of March in Santa Isabel do Rio Negro, sunrise is at 06:28 and sunset at 18:35. On the last day of the month, sunrise is at 06:20 and sunset at 18:27 -04.

Sunshine

In Santa Isabel do Rio Negro, the average sunshine in March is 5.8h.

UV index

January through June, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In March, the average maximum UV index of 6 translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.