Individual analysis by river basin

The main course of the Amazon River (Peru)

Updated on December 10, 2025

Accumulated precipitation vs climatology

30 days
chart

Comparison between climatological quantiles and observed accumulation.

Anomaly and trend

14 to 28 days
chart

Anomaly, forecast and observed indicators.

Basin highlights

The climatology of the period under analysis indicates rainfall with records varying between 229 and 261 mm being considered normal (reference quantiles 42.5% and 57.5%). On December 10, 2025, 220 mm of average accumulated precipitation was observed over the basin in 30 days, the calculation of the average of the categorized anomaly index in the basin area the value of -0.7, classifies the basin as tendency to dry contition. In the coming weeks, climate behavior indicates a increase in rainfall volumes, the sub-seasonal forecast model suggests behavior close to normality.

Climatology

229 mm - 261 mm

Observed 30 days

220 mm

Anomaly index

-0.7

Basin classification

tendency to dry contition

Forecast

behavior close to normality