Climate monitoring bulletin for the major river basins

The Amazon Basin

Volume 04 - Number 03

Publication date: January 21, 2026

Periodicity: Weekly

ISSN 2965-7857 • DOI 10.61818/78570403

Precipitation anomaly in the Amazon Basin
Legends

Current conditions

Maps of observed precipitation conditions, individual graphics by basin are produced from MERGE/GPM data generated by INPE/CPTEC, considering the period from de 2000 a 2025. Between December 23 to January 21, 2026, below-average rainfall caused precipitation deficits along the main course of the Amazon River in Brazilian and Peruvian territories, as well as in the watersheds of the Abacaxis, Aripuanã, Branco, Coari, Curuá Una, Guaporé, Içá, Iriri, Japurá, Javari, Ji-Paraná, Juruena, Jutaí, basins on the left bank of the Amazon River in the northeast and northwest of the state of Pará, Napo, Tapajós, Tefé, Teles Pires, Xingu, and the main course of the Solimões River; rainfall above climatology recorded in the Beni and Marañon river basins; rainfall close to normal recorded in the Juruá and Madeira river basins, basins on the left bank of the Amazon River in the northeast of the state of Amazonas, Negro, Purus, and Ucayali. The multimodel indicates above-average rainfall for the coming weeks in the north and northwest of the monitored region, on the main course of the Amazon River in Peruvian territory, the Branco, Coari, Içá, Japurá, Javari, Juruá, Jutaí, Madeira, the basins of the left bank of the Amazon River in the northeast of the state of Amazonas, Napo, Negro, Purus, Tefé, Ucayali, and the main course of the Solimões River; below-average rainfall forecast in the east, southeast, and south of the monitored region, along the main course of the Amazon River in Brazilian territory, the Abacaxis, Beni, Curuá Una, Guaporé, Iriri, and Mamoré river basins, the left bank basins of the Amazon River in the northeast of the state of Pará, and the Tapajós, Teles Pires, and Xingu rivers.

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