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icon for Highest temperature in Hong Kong on August 21?

Highest temperature in Hong Kong on August 21?

icon for Highest temperature in Hong Kong on August 21?

Highest temperature in Hong Kong on August 21?

31°C 99.9%

33°C <1%

24°C or below <1%

25°C <1%

Polymarket

$251,416 Vol.

31°C 99.9%

33°C <1%

24°C or below <1%

25°C <1%

Polymarket

$251,416 Vol.

24°C or below

$1,765 Vol.

<1%

25°C

$807 Vol.

<1%

26°C

$1,672 Vol.

<1%

27°C

$18,976 Vol.

<1%

28°C

$45,098 Vol.

<1%

29°C

$30,253 Vol.

<1%

30°C

$28,661 Vol.

<1%

31°C

$50,094 Vol.

100%

32°C

$36,966 Vol.

<1%

33°C

$23,160 Vol.

<1%

34°C or higher

$13,968 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 Aug '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 until data for this date has been published. 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 observations from the Hong Kong Observatory headquarters station recorded a daily maximum of 31°C on August 21, 2026, aligning with typical late-summer conditions under the influence of the prevailing subtropical ridge, light winds, and high humidity that limit diurnal temperature swings. This outcome dominates market-implied odds because the verified measurement from the authoritative reference station matches the 31°C bucket exactly, with climatological averages for the month hovering near that value and no anomalous heat or cooling events reported. Minor probabilities on adjacent outcomes reflect residual uncertainty only until final data confirmation, though revisions to official records remain rare given standardized instrumentation and quality controls at the site.

This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Aug '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 until data for this date has been published.

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
$251,416
End Date
Aug 21, 2026
Market Opened
Aug 19, 2026, 12:56 AM ET
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Aug '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 until data for this date has been published. 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.
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Aug '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 until data for this date has been published. 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 observations from the Hong Kong Observatory headquarters station recorded a daily maximum of 31°C on August 21, 2026, aligning with typical late-summer conditions under the influence of the prevailing subtropical ridge, light winds, and high humidity that limit diurnal temperature swings. This outcome dominates market-implied odds because the verified measurement from the authoritative reference station matches the 31°C bucket exactly, with climatological averages for the month hovering near that value and no anomalous heat or cooling events reported. Minor probabilities on adjacent outcomes reflect residual uncertainty only until final data confirmation, though revisions to official records remain rare given standardized instrumentation and quality controls at the site.

This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Aug '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 until data for this date has been published.

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
$251,416
End Date
Aug 21, 2026
Market Opened
Aug 19, 2026, 12:56 AM ET
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 21 Aug '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 until data for this date has been published. 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.

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Frequently Asked Questions

"Highest temperature in Hong Kong on August 21?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "31°C" at 100%, followed by "24°C or below" at 0%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 100¢ implies that the market collectively assigns a 100% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

As of today, "Highest temperature in Hong Kong on August 21?" has generated $251.4K in total trading volume since the market launched on Aug 19, 2026. This level of trading activity reflects strong engagement from the Polymarket community and helps ensure that the current odds are informed by a deep pool of market participants. You can track live price movements and trade on any outcome directly on this page.

To trade on "Highest temperature in Hong Kong on August 21?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in Hong Kong on August 21?" is "31°C" at 100%, meaning the market assigns a 100% chance to that outcome. The next closest outcome is "24°C or below" at 0%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in Hong Kong on August 21?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.