23°C

Decided by

The market resolves to the temperature range containing the highest temperature recorded by NOAA at Shanghai Pudong International Airport Station on 13 Oct '26.§1

No NOAA data

If NOAA data is unavailable by 11:59 PM ET the day after, the Weather Underground Daily Observations table is used.§3

Still no data

If there is no data by 11:59 PM ET the day after, the market resolves to the lowest bracket.§4

Erroneous data

If published data is clearly erroneous from technical or operational error or interference, the market may stay open up to 7 calendar days ET for a correction.§9

Revisions

Revisions to temperatures in the market's timeframe are considered until the first datapoint for the following date is published.§12

Counted

The highest reading under the "Temp" column for all times on the day, measured to whole degrees Celsius.§2

Source

NOAA, specifically the highest reading under the "Temp" column at https://www.weather.gov/wrh/timeseries?site=zspd.§2

Closes

Oct 13, 2026 · 12:00 UTC

Restated in plain words from the rules text. Each § opens the sentence it comes from; the rules text governs.

Shares = Yes minus No for each trader. Record counts every settled bet, including losses never cashed in. Polymarket's own contracts are left out.