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Monthly and Weekly Nino 4 Region SST Index: Central Tropical Pacific

Abstract: [Text Source: NOAA/CPC and NOAA/ESRL/PSD]

Nino Regions - for data sampling of SSTs the tropical Pacific has been divided into a number of regions named Nino 1, 2,3, 4, and 3.4 (which is encompasses part of both region 3 and 4). Nino 1 is the area defined by 80W-90W and 5S-10S, Nino 2 by 80W-90W and 0S-5S, Nino 3 by 90W-150W and 5N-5S, Nino 4 by 150W-160E and 5N-5S, Nino 3.4 by 120W-170W and 5N-5S. (see:

The Climate Prediction Center has weekly data since 1990 and monthly since 1950. The Climate Diagnostics Center has monthly Nino 4 since 1948.
Related URL
Description: Access to monthly Nino 4 SST index data since 1948
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Geographic Coverage
Spatial coordinates   
  N: 5.0   S: -5.0   E: -150.0   W: 160.0

Data Set Citation
Dataset Originator/Creator: NOAA/NWS/CPC
Dataset Title: Nino 4
Dataset Series Name: NOAA/NWS/CPC Indices and Forecasts
Dataset Release Date: ongoing
Dataset Release Place: Camp Springs, MD
Dataset Publisher: NOAA National Weather Service, Center for Climate Prediction
Online Resource:
Temporal Coverage
Start Date: 1948-01-01
Data Resolution
Temporal Resolution Range: Monthly - < Annual
Data Set Progress
Originating Center
Distribution Media: online www
Distribution Format: ascii
Fees: none
Email: Ed.Olenic at
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Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2005-12-13
Last DIF Revision Date: 2018-02-05