Official Hong Kong Observatory forecasts for September 17 project a minimum of 27°C under persistent easterly flow from a northeast monsoon, with daytime highs near 31°C and low precipitation risk. Multiple numerical models and private forecasts align closely on overnight lows of 26–27°C, reflecting typical late-summer climatology when dry, stable air and moderate winds prevent stronger radiational cooling. Recent model runs show minimal spread, supporting the market’s heavy weighting toward 27°C while leaving modest probability for a 26°C reading if boundary-layer moisture or wind speeds increase overnight. Updated HKO guidance and morning observations on the 17th will provide the final resolution data.
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 17?
27°C 60%
26°C 29%
25°C 8%
28°C 4%
21°C or below
2%
22°C
2%
23°C
3%
24°C
3%
25°C
8%
26°C
29%
27°C
60%
28°C
4%
29°C
2%
30°C
1%
31°C or higher
1%
27°C 60%
26°C 29%
25°C 8%
28°C 4%
21°C or below
2%
22°C
2%
23°C
3%
24°C
3%
25°C
8%
26°C
29%
27°C
60%
28°C
4%
29°C
2%
30°C
1%
31°C or higher
1%
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 15, 2026, 12:29 AM ET
Resolver
0x69c47De9D...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.
Resolver
0x69c47De9D...Official Hong Kong Observatory forecasts for September 17 project a minimum of 27°C under persistent easterly flow from a northeast monsoon, with daytime highs near 31°C and low precipitation risk. Multiple numerical models and private forecasts align closely on overnight lows of 26–27°C, reflecting typical late-summer climatology when dry, stable air and moderate winds prevent stronger radiational cooling. Recent model runs show minimal spread, supporting the market’s heavy weighting toward 27°C while leaving modest probability for a 26°C reading if boundary-layer moisture or wind speeds increase overnight. Updated HKO guidance and morning observations on the 17th will provide the final resolution data.
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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