The fall of 2025 in the southern hemisphere begins this Thursday (20)from 6:01 am, Brasília time. The station, transition between summer and winter, will have drier days and progressively lower temperatures . The information is from nottus meteorology.
The climate history points out that summer 2024 was the hottest recorded in Brazil and in the world with long periods of drought and fire records. The spring of 2024 brought back the rains.
Summer 2023/2024 started rainy, with formation of ZCAS but atmospheric blocks in February prevented rain and caused strong heat. March 2025 brought rain back, but insufficient to compensate for the February deficit. Summer 2024/2025 had heat waves in February contrasting with the milder January.
Climate neutrality
THE La Niña brief during summer/2025, is weakening, with warmer waters in the Pacific Tropical. CPC-NAAA forecast indicates climate neutrality In the coming months, persisting until winter, with high probability between June and August. Autumn and winter must follow under this condition.
“This should bring, unlike last year, a winter that, if not rigorous, with more cold days,” said the managing partner and meteorologist, Alexandre Nascimento. “The first most pronounced falls of temperature should occur from April, and even more significant in May, which can help to ‘warm’ retail sales to Mother’s Day.”
The autumn dand 2025 will mark the transition from damp to dry. See what are the forecasts for the coming months:
- March: It started with atmospheric block, preventing rain and raising temperatures. The weakening of the blockade brought rain back, but the accumulated can be below average in much of Brazil.
- April: The European model (ECMWF) foresees transition to the dry period, with concentrated rainfall at the end of the country and decreasing in the center. It is expected to be over-the-average volumes between Southeast and Midwest. Rain should intensify in the South, Argentina and Paraguay, besides the east of the Northeast, remaining bulky in the north. First cold waves in April, with a sharper temperature drop from the mid -month in Curitiba and variations at night and dawn in Belo Horizonte.
- May: Consolidated dry period in downtown Brazil, with rainfall in the South, North and East Strip of the Northeast. Intensification of cold waves and risk of frost at the highest points of the southern. Drop in the most pronounced temperature in São Paulo in the first half.
- June: Autumn under climate neutrality, with dry days and low temperatures. Possible rainfall episodes in the center of the country, despite the dry period. First cold waves at the beginning of the month. Drop in more sharp temperature in Belo Horizonte between May and June.
This content was originally published in Autumn 2025: Find out how this season will be and the weather forecast on CNN Brazil.
Source: CNN Brasil

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