Oceanic Niño Index (ONI), last 24 values

1.80°C

Equatorial Pacific

Sea surface temperature anomaly in the Niño 3.4 region, as a three-month running mean.

1 Augmin. -0.61, max. 1.801 Jul

The index stands at 1.80 °C for the JJA 2026 season, 3 consecutive seasons above the 0.5 °C threshold.
Observation

Maximum of the series: 1.80 °C (2026-07)
Minimum of the series: -0.61 °C (2025-11)
Consecutive seasons at 0.5 or above: 3

Method

Latest values published at the reading date, from the JAS 2024 season to the JJA 2026 season. Each point is placed at the central month of its three-month season. The anomaly is expressed against a sliding reference mean.

Source

NOAA Climate Prediction Center readings from this source

Nature

Observed data

Value read at the source and reproduced without processing.

Confidence

High

2026/253 · 10 SepRainfall accumulated over 30 days in six Pacific capitals 2026/255 · 12 SepMedian duration of a temporary measure

Oceanic Niño Index (ONI), last 24 values

Method

Source

Nature

Confidence

See also

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