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

NT's 2017 dry season disappearing fast, weather changes 'in line with global warming signals', BOM says

17:05 EST

The heart of the Northern Territory's dry season is probably over, with some towns experiencing record temperatures and averages well above normal on the weekend, a weather forecaster says.

Has Canberra's weather changed according to Bureau of Meteorology records?

17:01 EST

The weather is an ongoing topic of conversation for Canberrans and out-of-towners alike, who struggle to deal with its sub-zero temperatures in winter.

Snow blankets Trentham, parts of central Victoria as Melbourne shivers through wintry conditions

10:10 EST

Snow has blanketed parts of central Victoria this morning as cold, wintry conditions end any hope of an early spring for Melbourne.