← Polymarket

What will the peak RONI be for the 2026–27 El Niño?

Openone winner

Selected outcome

1.5–2.0

last

<1%

1.5–2.0 · <1%

Stored quote · checking the venue

Scheduled end
Mar 31, 2027 ET
Resolution source
cpc.ncep.noaa.gov (opens in a new tab)

Price

Loading price history.

Markets

  • Under 1.5

    Will the peak RONI for the 2026–27 El Niño be below 1.5?

    <1%

    Open · $0 24h · $1,686 vol

    last

    Ask 0.1¢

    Open full market view →
  • 1.5–2.0

    Will the peak RONI for the 2026–27 El Niño be at least 1.5 but below 2.0?

    <1%

    Open · $0 24h · $4,719 vol

    last

    Ask 1¢

    Open full market view →
  • 2.0–2.25

    Will the peak RONI for the 2026–27 El Niño be at least 2.0 but below 2.25?

    2%

    Open · $0 24h · $5,891 vol

    Bid 0.7¢ · Ask 3¢

    Open full market view →
  • 2.25–2.5

    Will the peak RONI for the 2026–27 El Niño be at least 2.25 but below 2.5?

    27%

    Open · $102 24h · $50k vol

    Bid 26¢ · Ask 28¢

    Open full market view →
  • Over 2.5

    Will the peak RONI for the 2026–27 El Niño be 2.5 or above?

    72%

    Open · $534 24h · $51k vol

    Bid 71¢ · Ask 72¢

    Open full market view →
Event statistics
24h vol
$636
Volume
$113k
Liquidity
$15k
Open int.
—

How this resolves

One winner.

Scheduled end
Mar 31, 2027 ET
  1. Trading
  2. Closed
  3. In review
  4. Resolved
Rules text

This market resolves "Yes" if the peak RONI for the 2026–27 El Niño is at least +1.5°C and below +2.0°C. Otherwise, it resolves "No". The peak RONI is the single highest Relative Oceanic Niño Index (RONI) value reported by NOAA's Climate Prediction Center (CPC) across the overlapping three-month seasons ASO 2026, SON 2026, OND 2026, NDJ 2026-27, and DJF 2026-27, as reported in official NOAA CPC RONI updates (https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso/roni/). The first published RONI value for each listed season is final and governs resolution; no subsequent revision to a season's value will change the outcome once that season's first value has been published. If CPC's RONI dataset is permanently discontinued, other information from NOAA may be used.

View on Polymarket