March weather forecast
São Mateus do Maranhão, Brazil

The first month of the autumn, March, is still a hot month in São Mateus do Maranhão, Brazil, with an average temperature fluctuating between 30.3°C (86.5°F) and 22.4°C (72.3°F).

Temperature

The advent of March observes an average high-temperature of a still hot 30.3°C (86.5°F), nearly identical to February's 30.5°C (86.9°F). São Mateus do Maranhão's average low-temperature for the month of March records at a pleasant 22.4°C (72.3°F).

Heat index

The heat index for March is appraised at a blisteringly hot 42°C (107.6°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In São Mateus do Maranhão, the average relative humidity in March is 90%.

Rainfall

The month with the most rainfall in São Mateus do Maranhão is March, when the rain falls for 30.3 days and typically aggregates up to 235mm (9.25") of precipitation.

Daylight

The average length of the day in March in São Mateus do Maranhão is 12h and 8min.
On the first day of the month, sunrise is at 06:04 and sunset at 18:15. On the last day of March, sunrise is at 05:59 and sunset at 18:04 -03.

Sunshine

In São Mateus do Maranhão, the average sunshine in March is 6.3h.

UV index

February through June and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In March, a regular UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.