State Seasonal Update Monthly indicators Seasonal conditions and drought assessment Rainfall Index (RI)
May 2026

Rainfall Index (RI)

Improvements observed in the RI values for parts of NSW

  • Autumn rainfall has improved the RI values in parts of the North West, Central West and Murray regions, though many areas remain below the 30th percentile.
  • 3 and 6 month rainfall deficits have been experienced across parts of northeastern NSW, Hunter and Central Tablelands.
Rainfall Index (RI)

Click on the scroll bar to view the map over the past 12 months.

Rainfall Index (RI) calculated with different aggregation windows
Image for Percentile Panel - Rain

Rainfall Index calculated at 3, 6, 18 and 24 months intervals.

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