Fairfax Media Network

NINO3.4 Index

  • index
  • SOI
  • NINO3.4

The NINO3.4 index is one of several El Niño/Southern Oscillation (ENSO) indicators based on sea surface temperatures.

NINO3.4 is the average sea surface temperature anomaly in the region bounded by 5°N to 5°S, from 170°W to 120°W. This region has large variability on El Niño time scales, and is close to the region where changes in local sea-surface temperature are important for shifting the large region of rainfall typically located in the far western Pacific.

An El Niño or La Niña event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niño or -0.4°C for La Niña for at least 6 consecutive months.

Display Your Local Weather

Weather News

Scorching Night for Central NT

13:00 EDT

Parts of Central NT have had their hottest morning in 7 years.

Heat coming to Sydney next week a sign of things to come

12:59 EDT

Sydney is getting set for a scorching January, with a warm-up early next week.

Climate change means workdays need to change during heatwaves, public health official warns

11:08 EDT

Workplace changes will be needed to deal with more severe heatwaves and other impacts of climate change, a public health official has warned.