El Niño maps and charts

Our climate scientists have prepared some maps and charts to graphically show the impact of past El Niño events and the possible impact of this year's El Niño event. 

El Niño summer rainfall anomaly maps 

Summer rainfall during previous strong El Niño events was lower across large areas of New Zealand than the average for the same period during other years. These maps show the extent of this rainfall anomaly, and the areas that were affected. 

View summer rainfall anomaly maps for previous El Niño events 

Chance of above normal rainfall patterns for El Niño and La Niña in New Zealand

El Niño and La Niña can impact rainfall in other ways, across different seasons. These maps show the probabilities of above normal rainfall across the El Niño weather cycle, and for each season. 

View maps showing rainfall patterns for El Niño and La Niña in New Zealand