March weather forecastCastanhal, Brazil

March

Weather in March

The first month of the autumn, March, is also a moderately hot month in Castanhal, Brazil, with an average temperature fluctuating between 29.7°C (85.5°F) and 22.6°C (72.7°F).

Temperature

Castanhal's coldest months, March and April, record an average high-temperature of 29.7°C (85.5°F).

Heat index

March's average heat index is calculated to be a scorching 40°C (104°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Castanhal, the average relative humidity in March is 91%.

Rainfall

The month with the most rainfall in Castanhal, Brazil, is March, when the rain falls for 30.8 days and typically aggregates up to 252mm (9.92") of precipitation.

Daylight

In Castanhal, the average length of the day in March is 12h and 7min.
On the first day of the month, sunrise is at 06:19 and sunset at 18:27. On the last day of March, sunrise is at 06:12 and sunset at 18:18 -03.

Sunshine

March has the least sunshine of the year, with an average of 5.6h of sunshine.

UV index

The months with the lowest UV index are January through April, June, August and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In March, a regular UV index of 6 translates into these guidelines:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

March and April are known as Castanhal's coldest months, with an average high-temperature of 29.7°C (85.5°F).

March temperatures in Castanhal vary between a high-temperature of 29.7°C (85.5°F) and a low-temperature of 22.6°C (72.7°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in March is calculated to be 40°C (104°F).

The average relative humidity in March in Castanhal, Brazil, is 91%.

The month with the most rainfall in Castanhal is March, when the rain falls for 30.8 days and typically aggregates up to 252mm (9.92") of precipitation.

In Castanhal, in March, it is raining for 30.8 days, with typically 252mm (9.92") of accumulated precipitation.

In March, the average day length is 12h and 7min.

In March, on the first day of the month, sunrise is at 06:19 and sunset at 18:27. On the last day of the month, in Castanhal, sunrise is at 06:12 and sunset at 18:18 -03.

With an average of 5.6h of sunshine, March has the least sunshine of the year.

The average sunshine duration in March is 5.6h.

January through April, June, August and December, with an average maximum UV index of 6, are months with the lowest UV index.

The average daily maximum UV index in March in Castanhal, Brazil, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F March A M J J A S O N D

Feb

March

Apr

Average high temperature

29.9°C

29.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.8km/h

5.7km/h

5.4km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

0.3

Average UV index

Average cloud cover

69%

71%

Average visibility

6km

Average temperature in March
Castanhal, Brazil

Average high temperature in March: 29.7°C

The warmest months (with the highest average high temperature) are October and November (33.5°C).
The months with the lowest average high temperature are March and April (29.7°C).

Average low temperature in March: 22.6°C

The month with the highest average low temperature is December (23°C).
The coldest month (with the lowest average low temperature) is July (21.5°C).

Average pressure in March
Castanhal, Brazil

Average pressure in March: 1010.7mbar

The month with the highest atmospheric pressure is July (1012.7mbar).
The month with the lowest atmospheric pressure is November (1009.2mbar).

Average wind speed in March
Castanhal, Brazil

Average wind speed in March: 5.2km/h

The windiest months (with the highest average wind speed) are September, October and November (6.9km/h).
The calmest month (with the lowest average wind speed) is April (4.8km/h).

Average humidity in March
Castanhal, Brazil

Average humidity in March: 91%

The month with the highest relative humidity is April (92%).
The month with the lowest relative humidity is November (76%).

Average rainfall in March
Castanhal, Brazil

Average rainfall in March: 252mm

The wettest month (with the highest rainfall) is March (252mm).
The driest month (with the least rainfall) is September (45mm).

Average rainfall days in March
Castanhal, Brazil

Average rainfall days in March: 30.8 days

The month with the highest number of rainy days is March (30.8 days).
The month with the least rainy days is November (22.2 days).

Average daylight in March /
Average sunshine in March
Castanhal, Brazil

Average daylight in March: 12h and 6min

The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 0min).

Average sunshine in March: 5h and 36min

The month with the most sunshine is August (Average sunshine: 8h and 36min).
The month with the least sunshine is March (Average sunshine: 5h and 36min).

Average sunshine days in March
Castanhal, Brazil

Average sunshine days in March: 0 days

The month with the most sunshine days is November (6 days).
The months with the least sunshine days are March and April (0 days).

Average UV index in March
Castanhal, Brazil

Average UV index in March: 6

The months with the highest UV index are May, July, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March, April, June, August and December (UV index 6).

Average cloud cover in March
Castanhal, Brazil

Average cloud cover in March: 71

The months with the most cloud cover are March and April (Cloud cover 71).
The months with the least cloud cover are October and November (Cloud cover 44).