Spring officially begins in Brazil this Tuesday, the 22nd, at 9:05 PM, according to Brasília time. This new period will be characterized by a gradual increase in both temperatures and rainfall across large parts of the country. The National Institute of Meteorology (INMET) reports that this season will last until December 21st, at 6:50 PM.
This season marks the transition between dry and rainy periods, being particularly noticeable in the central region of Brazil. During this time, the flow of humidity from the Amazon intensifies, which drives the advance of the rainy season in the Midwest, Southeast, and parts of the south-central region of the North.
Conversely, the extreme north of the Northeast is expected to have lower precipitation volumes. INMET specifically highlights northern Piauí and northwestern Ceará, areas where climatic accumulations are projected to remain below 100 millimeters.
Climatic Impacts of Spring
With the arrival of spring, temperatures tend to exceed usual winter levels. According to the climatology released by INMET, averages may exceed 28°C in the North and Northeast regions, as well as in isolated areas of the interior of the country. This continuous warming has the potential to intensify heatwaves and raise thermal discomfort.
INMET also signals an increase in evapotranspiration, a factor that affects soil moisture, and creates conditions conducive to the accelerated formation of severe storms due to the contrast between hot air and the passage of cold fronts.
Additionally, the spring of 2026 occurs in a scenario of El Niño development, a phenomenon that INMET has been monitoring throughout the year. In June, the institute had communicated that the phenomenon's conditions were established in the Equatorial Pacific, with a trend toward strengthening in the following months. In September, INMET reiterated the projection of a potentially very strong El Niño during the quarter between September, October, and November, emphasizing the importance of monitoring climatic conditions throughout the season.