**Stable atmospheric conditions under the influence of the northeast monsoon and a high-pressure ridge are keeping overnight lows tightly clustered near 26–27°C for Hong Kong on September 18.** Official Hong Kong Observatory guidance and multiple model outputs project a clear to mostly sunny night with light easterly winds, low precipitation risk, and minimum temperatures of 26–27°C, reflecting typical late-September radiative cooling under minimal cloud cover. Recent observations show overnight minima holding in this narrow band amid consistent dew points around 24–25°C and light winds that limit mixing. The near-even market split between 27°C and 26°C captures residual uncertainty from small differences in model guidance on exact radiative cooling rates and urban heat-island effects at measurement sites. No significant frontal passages or moisture surges are expected before resolution, so the outcome hinges on the precise overnight minimum recorded.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Hong Kong on September 18?
Lowest temperature in Hong Kong on September 18?
27°C 50%
26°C 47%
25°C 7%
28°C 3%
NEW
NEW
Sep 18, 2026
21°C or below
<1%
22°C
2%
23°C
3%
24°C
3%
25°C
7%
26°C
47%
27°C
50%
28°C
3%
29°C
<1%
30°C
1%
31°C or higher
1%
27°C 50%
26°C 47%
25°C 7%
28°C 3%
NEW
NEW
Sep 18, 2026
21°C or below
$71 Vol.
<1%
22°C
$0 Vol.
2%
23°C
$0 Vol.
3%
24°C
$0 Vol.
3%
25°C
$338 Vol.
7%
26°C
$3,100 Vol.
47%
27°C
$2,014 Vol.
50%
28°C
$723 Vol.
3%
29°C
$53 Vol.
<1%
30°C
$1,168 Vol.
1%
31°C or higher
$1,187 Vol.
1%
This market will resolve to the temperature range that contains the lowest temperature recorded by the Hong Kong Observatory in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Min (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.**Stable atmospheric conditions under the influence of the northeast monsoon and a high-pressure ridge are keeping overnight lows tightly clustered near 26–27°C for Hong Kong on September 18.** Official Hong Kong Observatory guidance and multiple model outputs project a clear to mostly sunny night with light easterly winds, low precipitation risk, and minimum temperatures of 26–27°C, reflecting typical late-September radiative cooling under minimal cloud cover. Recent observations show overnight minima holding in this narrow band amid consistent dew points around 24–25°C and light winds that limit mixing. The near-even market split between 27°C and 26°C captures residual uncertainty from small differences in model guidance on exact radiative cooling rates and urban heat-island effects at measurement sites. No significant frontal passages or moisture surges are expected before resolution, so the outcome hinges on the precise overnight minimum recorded.
This market will resolve to the temperature range that contains the lowest temperature recorded by the Hong Kong Observatory in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Min (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 Min (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 16, 2026, 12:30 AM ET
Volume
$8,654End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:30 AM ETResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by the Hong Kong Observatory in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Min (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.**Stable atmospheric conditions under the influence of the northeast monsoon and a high-pressure ridge are keeping overnight lows tightly clustered near 26–27°C for Hong Kong on September 18.** Official Hong Kong Observatory guidance and multiple model outputs project a clear to mostly sunny night with light easterly winds, low precipitation risk, and minimum temperatures of 26–27°C, reflecting typical late-September radiative cooling under minimal cloud cover. Recent observations show overnight minima holding in this narrow band amid consistent dew points around 24–25°C and light winds that limit mixing. The near-even market split between 27°C and 26°C captures residual uncertainty from small differences in model guidance on exact radiative cooling rates and urban heat-island effects at measurement sites. No significant frontal passages or moisture surges are expected before resolution, so the outcome hinges on the precise overnight minimum recorded.
This market will resolve to the temperature range that contains the lowest temperature recorded by the Hong Kong Observatory in degrees Celsius on 18 Sep '26.
The resolution source for this market will be information from the Hong Kong Observatory, specifically the "Absolute Daily Min (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 Min (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
$8,654End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 12:30 AM ETResolver
0x69c47De9D...**Stable atmospheric conditions under the influence of the northeast monsoon and a high-pressure ridge are keeping overnight lows tightly clustered near 26–27°C for Hong Kong on September 18.** Official Hong Kong Observatory guidance and multiple model outputs project a clear to mostly sunny night with light easterly winds, low precipitation risk, and minimum temperatures of 26–27°C, reflecting typical late-September radiative cooling under minimal cloud cover. Recent observations show overnight minima holding in this narrow band amid consistent dew points around 24–25°C and light winds that limit mixing. The near-even market split between 27°C and 26°C captures residual uncertainty from small differences in model guidance on exact radiative cooling rates and urban heat-island effects at measurement sites. No significant frontal passages or moisture surges are expected before resolution, so the outcome hinges on the precise overnight minimum recorded.
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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