Official Hong Kong Observatory forecasts for September 21 indicate a daily temperature range of 27–32°C under mainly cloudy skies with isolated showers and thunderstorms, yet sunny intervals during the day that support peak readings near the upper end. Light variable winds and high relative humidity (65–95%) limit rapid cooling while allowing surface heating from brief clear periods, consistent with late-summer subtropical conditions. Model consensus across sources clusters maxima around 28–32°C, with slight upward bias from recent hot spells and minimal cloud cover midday. Market-implied odds favoring 31–32°C reflect traders weighting the potential for these sunny breaks against thunderstorm suppression, with resolution hinging on the official Observatory maximum recorded at the reference station.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Hong Kong on September 21?
Highest temperature in Hong Kong on September 21?
31°C 37%
32°C 35%
30°C 13%
33°C 13%
NEW
$15,105 Vol.
NEW
$15,105 Vol.
Sep 21, 2026
25°C or below
<1%
26°C
<1%
27°C
<1%
28°C
1%
29°C
6%
30°C
13%
31°C
37%
32°C
35%
33°C
13%
34°C
1%
35°C or higher
<1%
31°C 37%
32°C 35%
30°C 13%
33°C 13%
NEW
$15,105 Vol.
NEW
$15,105 Vol.
Sep 21, 2026
25°C or below
$135 Vol.
<1%
26°C
$125 Vol.
<1%
27°C
$485 Vol.
<1%
28°C
$1,741 Vol.
1%
29°C
$3,586 Vol.
6%
30°C
$3,298 Vol.
13%
31°C
$1,008 Vol.
37%
32°C
$1,790 Vol.
35%
33°C
$1,077 Vol.
13%
34°C
$1,519 Vol.
1%
35°C or higher
$341 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.Official Hong Kong Observatory forecasts for September 21 indicate a daily temperature range of 27–32°C under mainly cloudy skies with isolated showers and thunderstorms, yet sunny intervals during the day that support peak readings near the upper end. Light variable winds and high relative humidity (65–95%) limit rapid cooling while allowing surface heating from brief clear periods, consistent with late-summer subtropical conditions. Model consensus across sources clusters maxima around 28–32°C, with slight upward bias from recent hot spells and minimal cloud cover midday. Market-implied odds favoring 31–32°C reflect traders weighting the potential for these sunny breaks against thunderstorm suppression, with resolution hinging on the official Observatory maximum recorded at the reference station.
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.
Market Opened: Sep 19, 2026, 12:56 AM ET
Volume
$15,105End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 12:56 AM ETResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.Official Hong Kong Observatory forecasts for September 21 indicate a daily temperature range of 27–32°C under mainly cloudy skies with isolated showers and thunderstorms, yet sunny intervals during the day that support peak readings near the upper end. Light variable winds and high relative humidity (65–95%) limit rapid cooling while allowing surface heating from brief clear periods, consistent with late-summer subtropical conditions. Model consensus across sources clusters maxima around 28–32°C, with slight upward bias from recent hot spells and minimal cloud cover midday. Market-implied odds favoring 31–32°C reflect traders weighting the potential for these sunny breaks against thunderstorm suppression, with resolution hinging on the official Observatory maximum recorded at the reference station.
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Max (deg. C)" the specified date once information is finalized in the relevant "Daily Extract", available here: https://www.weather.gov.hk/en/cis/climat.htm
In the event that there is no data for the observation date by 11:59 PM ET on the seventh day following the observation date, this market will resolve to the lowest bracket.
This market will resolve once data for this date has been published on the resolution source, or by 11:59 PM ET on the seventh day following the observation date, whichever comes first.
The resolution source for this market measures temperatures in Celsius to one decimal place (eg, 9.1°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is initially published for this market's timeframe will not be considered for this market's resolution.
Volume
$15,105End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 12:56 AM ETResolver
0x69c47De9D...Official Hong Kong Observatory forecasts for September 21 indicate a daily temperature range of 27–32°C under mainly cloudy skies with isolated showers and thunderstorms, yet sunny intervals during the day that support peak readings near the upper end. Light variable winds and high relative humidity (65–95%) limit rapid cooling while allowing surface heating from brief clear periods, consistent with late-summer subtropical conditions. Model consensus across sources clusters maxima around 28–32°C, with slight upward bias from recent hot spells and minimal cloud cover midday. Market-implied odds favoring 31–32°C reflect traders weighting the potential for these sunny breaks against thunderstorm suppression, with resolution hinging on the official Observatory maximum recorded at the reference station.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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