TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 19, 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 19 Jun '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 19 Jun '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 reflect real-money trader consensus and often diverge from traditional meteorological forecasts. While weather analysts publish deterministic point estimates and confidence intervals based on atmospheric models, this market aggregates the collective judgment of traders who face direct financial consequences for accuracy. Comparing the implied probabilities here to published forecasts from Hong Kong's Observatory or regional weather services can reveal where market participants expect conditions to differ from model predictions.
On Polymarket, traders set prices through an automated market maker that converts buy and sell orders into implied probabilities for each temperature outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each outcome contract reflects the collective willingness of participants to bet on that specific temperature range, with higher prices indicating greater confidence. As new information emerges or trading activity intensifies, prices adjust continuously to balance supply and demand across all available outcomes.
This market resolves around Jun 19, 2026, once the highest temperature recorded in Hong Kong on June 19 becomes verifiable from credible public sources. The outcome is determined by official meteorological data, typically reported by the Hong Kong Observatory or equivalent authoritative weather service. Resolution occurs after the trading window closes and the final temperature reading is confirmed and published.
Market prices may shift in response to updated seasonal forecasts, tropical weather systems approaching the region, or shifts in atmospheric pressure patterns. Real-time weather alerts, typhoon warnings, or significant changes to long-range climate models could trigger rapid repricing. Additionally, historical temperature anomalies or unusual heat events in nearby regions may influence trader expectations. As June 19 approaches, intraday weather updates and live atmospheric conditions will likely drive the most volatile price movements in the final hours before resolution.