March weather forecast
Altamira, Brazil

The first month of the autumn, March, is still a warm month in Altamira, Brazil, with an average temperature ranging between max 29.6°C (85.3°F) and min 22.3°C (72.1°F).

Temperature

March welcomes an average high-temperature of a still moderately hot 29.6°C (85.3°F), not much different from the preceding month. In Altamira, the average nighttime temperature during March is a pleasant 22.3°C (72.1°F).

Heat index

March's heat index is evaluated at a torrid 39°C (102.2°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunshine, the heat index could climb 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 influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In March, the average relative humidity is 90%.

Rainfall

In Altamira, Brazil, in March, during 29.1 rainfall days, 204mm (8.03") of precipitation is typically accumulated. Throughout the year, in Altamira, there are 260.4 rainfall days, and 1317mm (51.85") of precipitation is accumulated.

Daylight

In March, the average length of the day in Altamira, Brazil, is 12h and 8min.
On the first day of March, sunrise is at 06:35 and sunset at 18:46. On the last day of the month, sunrise is at 06:30 and sunset at 18:35 -03.

Sunshine

In Altamira, the average sunshine in March is 5.4h.

UV index

January through May, with an average maximum UV index of 6, are months with the lowest UV index in Altamira. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A typical high UV index of 6 in March suggests the following recommendations:
Deflect overexposure. Sun protection is a necessity. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.