Complete Guide: When is Sunset Today and the Astronomical Events of March 2026

For astronomy enthusiasts and those looking to make the most of natural daylight hours, knowing the exact sunset time today is essential. This information helps organize outdoor activities, from hiking to photography, maximizing the experience of observing celestial phenomena. Sunset times vary depending on latitude and season, especially important in March when we are transitioning between summer and autumn in the Southern Hemisphere.

The full day cycle: from dawn to sunset

The day begins much earlier than many think. According to data from the Naval Hydrographic Service (SHN), in Buenos Aires, civil twilight starts at 6:00 a.m., marking the moment when the atmosphere begins to scatter the first rays of sunlight. This period of partial brightness precedes actual sunrise, which occurs at 6:28 a.m., when the upper edge of the Sun emerges above the horizon.

At the opposite end of the day, sunset today reaches its critical point at 7:58 p.m., when the upper edge of the Sun disappears below the horizon, marking the end of the daylight hours. Immediately afterward, evening twilight begins at 8:25 p.m., a period during which sunlight gradually disperses through Earth’s atmosphere, creating a smooth transition between day and night that many appreciate.

Variations in these times are due to precise geographic factors. Latitude determines the Sun’s elevation angle, while Earth’s axial tilt causes significant seasonal changes. In mid-latitudes like Argentina, these variations can reach up to two hours between solstices, unlike near the equator where changes are minimal.

When will the maximum heat arrive? Weather predictions for today

Beyond daylight hours, another crucial piece of information for planning the day is temperature distribution. The National Meteorological Service (SMN) indicates that the highest temperature today will occur in the afternoon, reaching 27°C. The Windy platform provides greater precision, pinpointing 3:00 p.m. as the peak heat time.

This data is especially valuable for those engaging in physical activities or needing specific temperature conditions. Knowing that the maximum heat occurs in the mid-afternoon allows for strategic adjustments to work, exercise, or rest schedules.

Must-see eclipses in 2026

The astronomy of 2026 promises to be extraordinary, with four eclipse events spread throughout the year. The first was the annular solar eclipse on February 17, visible partially from southern Argentina and Chile, with the annular phase only in Antarctica. This type of eclipse occurs when the Moon is positioned between the Sun and Earth but is sufficiently far in its orbit to not completely cover the solar disk, leaving a “ring of fire” around the lunar edge.

Next, on March 3, there will be a total lunar eclipse, visible across the Pacific Ocean, all of the Americas including Argentina, East Asia, and Australia. During this event, the Moon fully enters Earth’s umbra, taking on a reddish hue popularly known as the “Blood Moon,” caused by the refraction of sunlight through Earth’s atmosphere.

The astronomical spectacle of 2026 continues on August 12 with a total solar eclipse, whose path of totality will cross the Arctic, Greenland, Iceland, and Spain. In this specific zone, daytime darkness will reveal the solar corona, the Sun’s outer atmosphere normally invisible. Finally, on August 28, a partial lunar eclipse will be visible from the Americas, Europe, and Africa.

Each type of eclipse has unique characteristics: annular eclipses maintain visible daylight brightness, while total eclipses completely transform the visual experience. Lunar eclipses can be observed with the naked eye, but solar eclipses require certified eye protection to prevent irreversible damage.

Meteor showers: when and where to observe meteors in 2026

Complementing the eclipses, 2026 will feature multiple meteor showers spread throughout the year. The Quadrantids are visible from late December to early January, while the Lyrids can be seen in late April.

The Eta Aquarids occur between late April and early May, followed by the Delta Aquarids and Perseids, both visible from late July to early August. Orionids take place from early October to mid-November, Leonids from early November to December, closing the cycle with the Geminids in December.

According to NASA, these meteor showers offer the perfect opportunity to observe fragments of comets disintegrating in Earth’s atmosphere, creating those luminous trails that make each night of astronomical observation memorable.