TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 6, 8:00 AM EST
Polymarket
This market will resolve to the temperature range that contains the highest temperature recorded by the Hong Kong Observatory in degrees Celsius on 6 Jul '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 6 Jul '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.
Prediction market odds often diverge from traditional meteorological forecasts because they incorporate real-time trader sentiment, historical volatility, and tail-risk pricing. While weather analysts issue point estimates and confidence intervals based on atmospheric models, this market aggregates the financial commitments of many traders with different information sets and risk tolerances. Over time, prediction markets have proven competitive with or superior to expert forecasts on weather events, particularly when traders have access to updated model runs and satellite data. Comparing the implied probability here to your preferred weather service can reveal where the market sees upside or downside surprises.
On Polymarket, traders set the odds through an automated market maker that prices each temperature outcome based on the ratio of shares bought and sold. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The more capital flowing into a particular temperature bracket, the higher its implied probability climbs. Prices update continuously as new trades execute, so the market reflects breaking weather updates, model revisions, and shifting trader conviction in real time. This mechanism ensures tight spreads and deep liquidity for the most likely outcomes.
This market resolves around Jul 6, 2026, once the highest temperature recorded in Hong Kong on July 6 is verified against credible public sources. The outcome is determined by the official meteorological data for that date, and the winning bracket is the one that correctly captures the peak temperature. Traders holding shares in the correct outcome bracket receive their payout once the event is confirmed and the market is settled. Until then, prices continue to shift as new information and forecasts emerge.
Major weather model updates, tropical storm or typhoon activity in the region, and seasonal monsoon patterns are key catalysts that could shift odds significantly. Real-time satellite imagery, atmospheric pressure systems, and upper-air wind patterns all feed into trader expectations. Additionally, historical temperature records for early July in Hong Kong and any unusual heat waves or cooling events in nearby regions may influence positioning. As the event date approaches, intraday weather alerts and final model consensus runs typically trigger the largest repricing, so watch for updates 48–72 hours before July 6.