This contract is a daily temperature market hosted on Polymarket for the lowest temperature in Shenzhen on October 21, 2026. It resolves to the temperature range that contains the lowest reading recorded by NOAA at the Shenzhen Bao'an International Airport Station, measured in degrees Celsius for that date [1]. The market is organized as an event with several temperature brackets, each of which is its own yes or no contract, so a trader can take a position on whether the minimum falls in a particular bracket [1]. The resolution source is the NOAA time series for the station. The contract directs the reader to the lowest value in the "Temp" column for all times on that day, and it asks that the Celsius display be used [1]. The rules state that the source reports whole degrees Celsius, so resolution uses that level of precision [1]. If NOAA data for the observation date is unavailable by 11:59 PM ET on the following day, the rules name the Weather Underground Daily Observations table as the fallback [1]. If no data for the observation date exists by that deadline, the market resolves to the lowest bracket [1]. The contract also sets timing rules. It resolves once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day after the observation date, whichever comes first [1]. Revisions to temperatures within the market's timeframe are considered until the first data point for the following date is published, after which later changes are not considered [1]. The rules also address erroneous data. If the source publishes clearly erroneous data caused by technical or operational error or by unauthorized interference, the market may stay open for up to seven calendar days (ET) from the original release so the source can issue a correction [1]. If a corrected value appears in that window, it becomes eligible for resolution. If none appears, Polymarket may issue a clarification on whether the original value can be used or whether other action is needed [1]. The listed end time for the event is 2026-10-21T12:00:00.000Z, and the provider status in the saved record is active [1]. That end time is a field in the contract record and should not be read as a confirmed date for any event beyond what the contract rules describe. Shenzhen itself is a prefecture-level city in Guangdong, China, located on the east bank of the Pearl River estuary [2]. The Wikipedia excerpt reports a population of 18.2 million in 2025 and describes the Port of Shenzhen as the world's fourth-busiest container port [2]. These details describe the city generally and do not bear on the daily minimum temperature the contract measures.

Historical Context

The supplied Wikipedia excerpt describes Shenzhen as a special economic zone [2]. That is the only historical description in the available evidence, and it does not explain how the city's climate or weather reporting has changed over time. The supplied evidence does not describe the history of temperature measurement at the Shenzhen Bao'an International Airport Station.

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