Individual analysis by river basin

The main course of the Amazon River (Brazil)

Updated on February 11, 2026

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 246 and 271 mm being considered normal (reference quantiles 42.5% and 57.5%). On February 11, 2026, 209 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 -1.3, classifies the basin as dry condition. In the coming weeks, climate behavior indicates a increase in rainfall volumes, the sub-seasonal forecast model suggests dry behavior or a tending to be very dry.

Climatology

246 mm - 271 mm

Observed 30 days

209 mm

Anomaly index

-1.3

Basin classification

dry condition

Forecast

dry behavior or a tending to be very dry