Climate monitoring bulletin for the major river basins

The Amazon Basin

Volume 04 - Number 29

Publication date: July 22, 2026

Periodicity: Weekly

ISSN 2965-7857 • DOI 10.61818/78570429

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 1998 a 2025. Between June 23 to July 22, 2026, rainfall below climatological norms resulted in a precipitation deficit along the main course of the Amazon River in Peruvian territory, in the watersheds of the Abacaxis, Branco, Içá, Japurá, and Jutaí rivers, in the watersheds on the left bank of the Amazon River in the northeast of the state of Amazonas, in the northeast and northwest of the state of Pará, and in the watersheds of the Napo, Negro, and Ucayali rivers, and the main course of the Solimões River; rainfall above the climatological average was recorded in the watersheds of the Aripuanã, Coari, Guaporé, Iriri, Juruena, Madeira, Mamoré, Tefé, Teles Pires, and Xingu rivers; rainfall close to normal levels was recorded along the main course of the Amazon River in Brazilian territory, as well as in the river basins of the Beni, Curuá Una, Javari, Ji-Paraná, Juruá, Marañon, Purus, and Tapajós rivers.The multi-model indicates, for the period from July 22 to July 28, 2026, forecast of positive precipitation anomalies over the main course of the Amazon River in Peruvian territory, the watersheds of the Abacaxis, Coari, Içá, Iriri, Japurá, Javari, Juruena, Jutaí, Madeira, Marañon, Napo, Purus, Tapajós, Tefé, and Ucayali rivers, and the main course of the Solimões River; forecast of negative precipitation anomalies concentrated to the north of the monitored area, over the main course of the Amazon River in Brazilian territory, the Branco River basin, the basins on the left bank of the Amazon River in the northeast of the state of Amazonas, the northeast and northwest of the state of Pará, and the Negro River basin; precipitation levels close to climatological norms are forecast for the remaining river basins.

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