The Hong Kong Observatory (HKO) recorded a maximum air temperature of 31.6°C at its headquarters on May 12, 2026, driving trader consensus to 100% implied probability for "31°C or higher," as this official measurement—taken via standardized instrumentation at the reference station—defines market resolution. A southerly airstream brought warm, humid air masses over the region, combined with sunny periods and light winds that minimized cloud cover and enhanced daytime solar heating, aligning with HKO's seasonal forecast of normal to above-normal May temperatures amid a projected hot 2026. While data revisions from quality checks are exceedingly rare for settled observations, an unprecedented instrument malfunction or audit uncovering measurement error could theoretically challenge this positioning before final confirmation in the monthly summary.
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 May 12?
31°C or higher 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$436,853 Vol.
$436,853 Vol.
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
No
29°C
No
30°C
No
31°C or higher
Yes
31°C or higher 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$436,853 Vol.
$436,853 Vol.
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
No
29°C
No
30°C
No
31°C or higher
Yes
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: May 10, 2026, 12:09 AM ET
Resolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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.
Resolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
The Hong Kong Observatory (HKO) recorded a maximum air temperature of 31.6°C at its headquarters on May 12, 2026, driving trader consensus to 100% implied probability for "31°C or higher," as this official measurement—taken via standardized instrumentation at the reference station—defines market resolution. A southerly airstream brought warm, humid air masses over the region, combined with sunny periods and light winds that minimized cloud cover and enhanced daytime solar heating, aligning with HKO's seasonal forecast of normal to above-normal May temperatures amid a projected hot 2026. While data revisions from quality checks are exceedingly rare for settled observations, an unprecedented instrument malfunction or audit uncovering measurement error could theoretically challenge this positioning before final confirmation in the monthly summary.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions