Fairfax Media Network

Agriculture Weather

NINO3.4 Index

  • location
  • Aus

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.

Southern Oscillation Index


Nino3.4 Index

Display Your Local Weather

Weather News

Victoria's mosquito population soars after wet spring, prompting early warning

18:04 EDT

Floods and heavy rains in Victoria have caused mosquito numbers to soar, prompting the state's health authorities to issue an early warning.

Aurora Australis dazzles Tasmania's night sky

17:52 EDT

The Aurora Australis, or southern lights, has dazzled the night sky in Tasmania.

Australia's superb snow season

17:06 EDT

The 2016 snow season continues to impress, with statistics piling up likeâ?¦snow.