Climate monitoring bulletin for the major river basins

The Amazon Basin

Volume 03 - Number 34

Publication date: August 20, 2025

Periodicity: Weekly

ISSN 2965-7857 • DOI 10.61818/78570534

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 2024. Between July 22 to August 20, 2025, rainfall below climatological norms concentrated in the southeast of the monitored area characterized a precipitation deficit over the main course of the Amazon River in Peruvian territory, the hydrographic basins of the Aripuanã, Beni, Branco, Guaporé, Içá, Japurá, Javari, Ji-Paraná, Mamoré, Napo, Negro, Purus, and Ucayali rivers; Above-average rainfall is forecast for the Coari, Curuá Una, and left bank basins of the Amazon River in northwestern Pará State, Tapajós, and Tefé; Rainfall close to normal over the main course of the Amazon River in Brazilian territory, the river basins of the Abacaxis, Iriri, Juruá, Juruena, Jutaí, Madeira, Marañon, basins on the left bank of the Amazon River in the northeast of the state of Amazonas and in the northeast of the state of Pará, Teles Pires, Xingu, and the main course of the Solimões River. The multimodel indicates above-average rainfall for the coming weeks along the main course of the Amazon River in Peruvian territory and the Napo River basin; Below-normal rainfall is forecast for the main course of the Amazon River in Brazilian territory and the Branco, Curuá Una, Iriri, and left bank basins of the Amazon River in northeastern Amazonas State and northeastern and northwestern Pará State; rainfall close to normal is forecast for the other basins in the monitored region.

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