Latest Southern Oscillation Index values
Note: Calculated using the 1887-1989 base period. This information is usually updated every weekday at 2:00pm (AEST), public holidays excluded.
Date: 23 February 2012
Average SOI for last 30 days: 3.3
Average SOI for last 90 days: 12.1
Daily contribution to SOI calculation: 5.6
| November | 12.4 |
|---|---|
| December | 22.2 |
| January | 9.6 |
Last updated 27 January 2011