Chart of Relative Oceanic Niño Inde (RONI)
This is a chart showing Relative Oceanic Niño Index (RONI) from NOAA's Climate Prediction Center. This visualization is automatically updated. The source data is updated monthly around the 5th of each month. Each data point is a 3 month average centered on the middle month (e.g., June, July, August).
This simple visualization was created as a part of an El Niño dashboard for the Earth Information Center.
RONI chart from 1950 to present.
Credits
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Visualizer
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Greg Shirah
(NASA/GSFC)
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Greg Shirah
(NASA/GSFC)
Series
This page can be found in the following series:Release date
This page was originally published on Tuesday, October 20, 2026.
This page was last updated on Tuesday, October 20, 2026 at 4:48 PM EDT.