ENSO index

NOAA's Oceanic Niño Index or weekly Niño 3.4 anomaly.

Request

GET /v1/history/enso

curl "https://tubig-api.rjhon.net/v1/history/enso?limit=2"

5 calls a minute per visitor. Follow next for more.

Parameters

Name	In	Type	Default	What it does
`index`	query	one of oni, nino34_weekly	`oni`	oni: 3-month means since 1950; nino34_weekly: weekly since 1981
`limit`	query	integer, 1 to 500	`100`	Items per call, at most 500
`cursor`	query	string or null		The cursor from a previous response's next link

Response

An object with items (the fields below), next (the next page, or null) and sources (whom to credit).

Field	Type	What it is
`index`	string	oni or nino34_weekly
`period`	string	JJA 2026 for the ONI; the week for Niño 3.4
`period_end`	date (YYYY-MM-DD)	The period's last day
`value`	number	The index value, °C

Live example

Open in the browser

The first 2 items of what Tubig holds now.

{
  "items": [
    {
      "index": "oni",
      "period": "JJA 2026",
      "period_end": "2026-08-31",
      "value": 1.8
    },
    {
      "index": "oni",
      "period": "MJJ 2026",
      "period_end": "2026-07-31",
      "value": 1.39
    }
  ],
  "next": "/v1/history/enso?limit=2&cursor=WyJkYXRlIiwgIjIwMjYtMDctMzEiLCA5MThd",
  "sources": [
    {
      "name": "NOAA Climate Prediction Center",
      "url": "https://www.cpc.ncep.noaa.gov/data/indices/",
      "licence": "Public domain"
    }
  ]
}