Individual analysis by river basin
Updated on December 31, 2025
Accumulated precipitation vs climatology
30 days
Comparison between climatological quantiles and observed accumulation.
Anomaly and trend
14 to 28 days
Anomaly, forecast and observed indicators.
Basin highlights
The climatology of the period under analysis indicates rainfall with records varying between 166 and 186 mm being considered normal (reference quantiles 42.5% and 57.5%). On December 31, 2025, 146 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 -1.1, classifies the basin as dry condition. In the coming weeks, climate behavior indicates a increase in rainfall volumes, the sub-seasonal forecast model suggests behavior close to normality or a tending to be dry.
Climatology
166 mm - 186 mm
Observed 30 days
146 mm
Anomaly index
-1.1
Basin classification
dry condition
Forecast
behavior close to normality or a tending to be dry