Hong Kong Observatory (HKO) observations confirm the highest air temperature reached 28°C at the Observatory headquarters on April 21, 2026, driving trader consensus to 100% implied probability for this outcome as the market nears resolution. This aligns with pre-event forecasts from HKO's 9-day outlook, which projected daytime highs of 25-28°C amid a southerly airstream bringing warm, humid conditions typical for late April in the region, where historical April maxima average around 26-27°C. Model consensus had converged on this range in the final 24 hours, reflecting stable atmospheric patterns with low cloud cover and moderate winds. Realistic challenges are minimal post-measurement—only a rare official data revision due to sensor calibration issues or higher reading from a secondary station could alter it, though HKO headquarters data governs resolution.
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 April 21?
Highest temperature in Hong Kong on April 21?
28°C 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$425,347 Vol.
$425,347 Vol.
Apr 21, 2026
21°C or below
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C or higher
No
28°C 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$425,347 Vol.
$425,347 Vol.
Apr 21, 2026
21°C or below
$11,131 Vol.
No
22°C
$4,287 Vol.
No
23°C
$3,222 Vol.
No
24°C
$10,874 Vol.
No
25°C
$19,353 Vol.
No
26°C
$29,334 Vol.
No
27°C
$44,443 Vol.
No
28°C
$118,998 Vol.
Yes
29°C
$85,734 Vol.
No
30°C
$54,723 Vol.
No
31°C or higher
$43,247 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Apr '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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized for this market's timeframe will not be considered for this market's resolution.Hong Kong Observatory (HKO) observations confirm the highest air temperature reached 28°C at the Observatory headquarters on April 21, 2026, driving trader consensus to 100% implied probability for this outcome as the market nears resolution. This aligns with pre-event forecasts from HKO's 9-day outlook, which projected daytime highs of 25-28°C amid a southerly airstream bringing warm, humid conditions typical for late April in the region, where historical April maxima average around 26-27°C. Model consensus had converged on this range in the final 24 hours, reflecting stable atmospheric patterns with low cloud cover and moderate winds. Realistic challenges are minimal post-measurement—only a rare official data revision due to sensor calibration issues or higher reading from a secondary station could alter it, though HKO headquarters data governs resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Apr '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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized 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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 19, 2026, 12:07 AM ET
Volume
$425,347End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:07 AM ETResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Apr '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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized for this market's timeframe will not be considered for this market's resolution.Hong Kong Observatory (HKO) observations confirm the highest air temperature reached 28°C at the Observatory headquarters on April 21, 2026, driving trader consensus to 100% implied probability for this outcome as the market nears resolution. This aligns with pre-event forecasts from HKO's 9-day outlook, which projected daytime highs of 25-28°C amid a southerly airstream bringing warm, humid conditions typical for late April in the region, where historical April maxima average around 26-27°C. Model consensus had converged on this range in the final 24 hours, reflecting stable atmospheric patterns with low cloud cover and moderate winds. Realistic challenges are minimal post-measurement—only a rare official data revision due to sensor calibration issues or higher reading from a secondary station could alter it, though HKO headquarters data governs resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Apr '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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized 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
This market can not resolve to "Yes" until data for this date has been finalized.
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 finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$425,347End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:07 AM ETResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Hong Kong Observatory (HKO) observations confirm the highest air temperature reached 28°C at the Observatory headquarters on April 21, 2026, driving trader consensus to 100% implied probability for this outcome as the market nears resolution. This aligns with pre-event forecasts from HKO's 9-day outlook, which projected daytime highs of 25-28°C amid a southerly airstream bringing warm, humid conditions typical for late April in the region, where historical April maxima average around 26-27°C. Model consensus had converged on this range in the final 24 hours, reflecting stable atmospheric patterns with low cloud cover and moderate winds. Realistic challenges are minimal post-measurement—only a rare official data revision due to sensor calibration issues or higher reading from a secondary station could alter it, though HKO headquarters data governs resolution.
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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