Tech & ScienceCloses · in 11 hours$1K volumePart of: Highest temperature in Wellington on November 15? →

Will the highest temperature in Wellington be 18°C on November 15?

Gotcha risk

Low

0 of 4 factors flagged

Watch for: This market features highly specific, deterministic resolution rules based on official METAR data from a designated station at Wellington International Airport.

Read the full assessment

This market features highly specific, deterministic resolution rules based on official METAR data from a designated station at Wellington International Airport. The rules rigorously define how temperatures are extracted, prioritizing the precise hourly temperature remark group before falling back to the standard observation body, and explicitly lay out mathematical rounding standards. Timelines and cutoff mechanics are strictly tied to station local time and the publication of subsequent observations, with a specified backup source and fallback outcome if data is missing. The primary source is an official Aviation Weather Center endpoint, leaving almost no room for discretion.

Resolver
Low
Timing
Low
Wording
Low
Exceptions
Low

AI-generated analysis · google/gemini-3.7-flash ·

Current price

57%

chance
Yes57¢
No43¢
18°C · Yes · 1MO 47.0 H 57.0 L 47.0 C 57.0+10.0 (+21.3%)

Why it moved

No big moves in the last 7 days.

Resolution rules

This market will resolve to the temperature range that contains the highest temperature reported at Wellington Intl Airport (NZWN) on 15 Nov '26. The qualifying value is the highest temperature reported in the hourly temperature remark of any routine (METAR) observation for Wellington Intl Airport (NZWN) on that date, in tenths of a degree Celsius as reported. A report whose line begins with SPECI is a special observation and does not count. Every other report is routine, including one issued off the nominal hour and one that carries no METAR or SPECI label. For How to Read the METAR Report, see: https://polymarket-upload.s3.us-east-2.amazonaws.com/market_products/Weather/How+to+Read+the+METAR+Report.pdf The hourly temperature remark is the group beginning with the letter T followed by exactly eight digits. After the T, one digit for sign (0 positive, 1 negative) and three for tenths of a degree Celsius give the temperature; the following four are the dew point and are not used. T01390133 is 13.9°C; T10171022 is −1.7°C. If a routine observation does not carry the hourly temperature remark, the temperature group in the body of that observation governs for that observation, in whole degrees Celsius as reported. It appears as temperature and dew point separated by a slash, with M marking a negative value: 18/12 is 18°C; M11/M17 is −11°C. An observation that reports no temperature in either place is disregarded. Each market in this event states its range in whole degrees Celsius. The qualifying value is rounded to the nearest whole degree, with a value ending in exactly half rounded up to the next higher whole degree, and that whole Celsius value determines which range contains it. For example, 13.9°C counts as 14°C; 17.4°C counts as 17°C; 16.5°C counts as 17°C; −1.7°C counts as −2°C; −8.5°C counts as −8°C. An observation counts if its time stamp, converted to the station's local time (including any daylight-saving shift in effect), falls on the observation date. This market will resolve at the issuance of the first METAR observation for the station on the day following the observation date or by 11:59 PM ET on the day following the observation date, whichever comes first. Resolution is determined from the observations the resolution source shows for the observation date. In the event that the Aviation Weather Center has published no routine observation reporting a temperature for the observation date by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source. In the event that neither source has published data sufficient to determine a temperature for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket. The report the resolution source shows for a given observation time is the one that counts, whether or not it is marked as a correction (COR). Changes to observations within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered. Where the first routine observation for the following date is published before that deadline, resolution is determined from a read taken after it. Where it is not, resolution is determined from a read taken at that deadline. In the case that the Resolution Source publishes data, sufficient to settle a Market, that is clearly erroneous and the result of technical or operational error, or of unauthorized interference with the Resolution Source or its data, the Market may remain open for a period of up to seven (7) calendar days (ET) from the time of the original release, in anticipation of a correction by the Resolution Source. If the Resolution Source publishes a corrected value within that period, that value will be eligible for resolution. If no corrected value is published within that period, Polymarket will issue a Clarification to determine whether the originally published value may be eligible for resolution, or whether other action is required to preserve the orderly functioning of the Market. The resolution source for this market will be the routine observations for Wellington Intl Airport (NZWN) published here: https://aviationweather.gov/api/data/metar?ids=NZWN&format=raw&date=2026-11-15T14:00:00Z&hours=30

Market explained

This market measures whether the highest temperature recorded at Wellington Intl Airport (NZWN) on November 15, 2026, rounds to 18°C.

How it resolves

The market resolves to Yes if the highest qualifying routine (METAR) temperature on November 15, 2026, rounded to the nearest whole degree Celsius (half rounding up), is 18°C. It resolves to No if the rounded highest temperature is any other value. Special observations (SPECI) do not count. The hourly temperature remark (T-group) in tenths of a degree Celsius governs; if absent, the body temperature in whole degrees is used. The primary source is routine observations from Aviation Weather Center. If unavailable by 11:59 PM ET the following day, Weather Underground Daily Observations is used. If neither provides sufficient data, the market resolves to the lowest bracket.

Resolution source

Aviation Weather Center

AI-generated analysis · google/gemini-3.7-flash ·