Table of Contents
- Autumn features
- Autumn Equinox
- Beginning of autumn 2023 to 2025
- Seasons of the Year in Brazil in 2022
- weather changes in autumn
- National holidays and optional points during autumn
Summer has gone and autumn has appeared here, a new season that started in the Southern Hemisphere at 12:33 pm yesterday (20). Considered a transition season between summer and winter, autumn in Brazil will last until the June 21. Until then, rains should be scarcer, especially in the interior of Brazil, including the northeastern semi-arid region, according to the National Institute of Meteorology (Inmet). In the coastal region of the Northeast and Amazon region, the rains happen more frequently.
Four national holidays will also be part of the new season, characterized by the leaves on the trees that dry and fall, allowing stunning scenery in some parts of the country. Curious to know what autumn will be like in Brazil? O showmetech separated information such as weather conditions, holidays, curiosities about the season and other very interesting information about this time of year.
Autumn is a season of the year that occurs after summer and before winter. One of the main features of this season are the days that start to get shorter and the nights get longer. This is because the sun tends to rise later and set earlier than in the summer, for example. Even in this period, the temperature, which used to be high in the summer, starts to cool down — unless you live in Rio de Janeiro or Salvador. In addition, rains occur less frequently.
In the Northern Hemisphere, autumn begins on the 22nd and 23rd of September and, in the Southern Hemisphere, on the 20th and 21st of March. Whenever it is autumn in the Northern Hemisphere, it is spring in the Southern Hemisphere and vice versa. Seasonal changes are more pronounced in temperate and subtropical regions. Another striking feature is the fall of leaves, which only occurs in deciduous plants (plants that lose their foliage at one time of year). In addition, fruit plants tend, at this time of year, to ripen their fruits, allowing for greater production.
Winds also increase and get stronger during autumn. Due to the fact that this season precedes winter, it is natural that there are constant drops in temperatures. With this fall, there is a decrease in air humidity, causing the appearance of frost and snow in the coldest places in the country. In Brazil, autumn has more influence and better defined characteristics in the south of the Southeast Region and in the South Region, as they are closer to or located in the southern temperate zone.
Have you heard about the autumn equinox? It is nothing more than a natural phenomenon in which the Sun is positioned on the equator, in a straight line, promoting days and nights with the same duration. Thanks to this, the incidence of the Sun becomes greater in regions close to the equator. In Brazil, the equinox is also responsible for marking the beginning of spring. Therefore, we have two equinoxes in the year that occur in the months of March (autumn equinox) and September (spring equinox).
At the end of autumn, which this year takes place on June 21, another astronomical event takes place: the winter solstice. This is the name given in the Southern Hemisphere to the period when the Northern Hemisphere is inclined about 23,5º towards the Sun. That is, in the Northern Hemisphere it is summer, while in the Southern Hemisphere it is winter.
An interesting fact about these phenomena is that they do not happen on the same day, but rather vary with each passing year. The beginning of autumn, as mentioned above, takes place on the 20th or 21st of March. This is thanks to an “inconsistency” in our calendar, which is actually 365 days and 6 hours long, approximately. Thus, there is a variation of 6 hours year over year. This amount of hours is compensated for in the well-known leap year, which is when an extra day is added to the calendar, providing the 29th of February.
In an interview with Abril Group, Professor Emeritus and Doctor of Physics at the Federal University of Rio Grande do Sul (UFRGS), Horacio Alberto Dottori, also highlighted another curiosity regarding this alternation of days. “The Earth moves in an elliptical orbit (shaped like an ellipse, almost oval) and when it is closer to the Sun, the planet moves faster. This also makes the Northern Hemisphere spring and summer slightly longer than the Southern Hemisphere.”, Explica.
Beginning of autumn 2023 to 2025
Based on data released by the Astronomy Department of the Institute of Astronomy, Geophysics and Atmospheric Sciences – IAG/USP, we have separated the autumn periods for the coming years. Check out:
- Fall 2023 starts on March 20 at 18:25 pm and ends on June 21;
- Fall 2024 starts on March 20 at 00:06 pm and ends on June 20;
- Autumn 2025 starts on March 20 at 06:02 am and ends on June 20.
Seasons of the Year in Brazil in 2022
The four seasons of the year in Brazil – in the order of autumn, winter, spring and summer – start on the following dates and times:
Autumn: March 20, 2022, at 12:33 pm;
Winter: June 21, 2022, at 06:14 am;
Spring Season: September 22, 2022, at 22:04 pm;
Summer: December 21, 2022 at 18:48 pm.
The times are relative to the current time in Brasília, Distrito Federal.
weather changes in autumn
O National Institute of Meteorology (Inmet) prepared a forecast on the climate forecast of the five regions of Brazil during the autumn. Check below the forecast for the period made by Inmet and published by Agência Brasil.
In the Northeast Region, there will be an increase in the temperature of the waters near the northeast coast, which may increase the chances of rain until the end of autumn. In the eastern northeast, the forecast is for a gradual increase in rainfall between the autumn and winter seasons, due to the evolution of the Eastern Wave Disturbances (DOL). According to Inmet, temperatures will remain close to and above average in the region, except in the northern part of the states of Maranhão, Piauí and Ceará, where temperatures may be milder.
In the Center-West region, the forecast is that rains will occur in normal to below the climatological average in much of the region, except in the central and eastern parts of Mato Grosso, where there may be more frequent rains during the month of April. From May onwards, the driest period begins in the central area of the country. The agency projects above-average temperatures throughout the region, with the exception of eastern Mato Grosso do Sul, where predicted temperatures may decline over the autumn months.
According to Inmet, rainfall in the Southeast region should remain below average over the next three months. Normally, this period already experiences a drop in the volume of rainfall in the period. The air temperature should also prevail close to and slightly above the climatology of the period, but the agency does not rule out the possibility of the entry of cold air masses that may decrease temperatures in higher altitude locations, starting in May.
The climate forecast for the Southern Region of Brazil shows that rainfall will be below average in most of the three states, due to the impacts that the La Niña phenomenon can cause. Despite this, the institute says that there may be cold fronts that cause rains, especially in the eastern portion of the region. The Inmet also informed that the air temperature in the South Region should prevail close to and above the climatology of the period, but the possibility of an incidence of frost, especially in mountainous areas, as winter approaches.
In the northern region of the country, rainfall is expected to remain above average, especially in northeast Pará and northwest Amazonas. In the southwest of Pará, the probabilities are of below-average rainfall.
National holidays and optional points during autumn
During the fall, four national holidays/optional points will take place in Brazil. Check out what they are below.
- April 15 (Friday), Passion of Christ (national holiday);
- April 21 (Thursday), Tiradentes (national holiday);
- May 1 (Sunday), World Labor Day (national holiday);
- June 16 (Thursday), Corpus Christi (optional point);
Artificial intelligence predicts the impact of climate change on the world. Check out all the information on the subject atthis Showmetech article.