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 2, 8:00 AM EST
Polymarket
This market will resolve to the temperature range that contains the highest temperature recorded at the London City Airport Station in degrees Celsius on 2 Jun '26. The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC. To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C. This market can not resolve until the first data point for the following date has been published on the resolution source. The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Prediction market odds on Polymarket reflect aggregated trader beliefs about London's peak temperature on June 2, often incorporating meteorological models and seasonal patterns. Analyst forecasts from weather services like the UK Met Office typically focus on probabilistic ranges and confidence intervals. Markets may diverge from official forecasts if traders price in tail risks, model uncertainty, or recent climate anomalies. Comparing the two reveals whether the crowd is more bullish or bearish on extreme heat relative to professional meteorologists, offering insight into market risk appetite and information efficiency.
On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Polymarket, the event is priced as a set of mutually exclusive temperature outcome contracts, each reflecting the probability traders assign to that range occurring. Prices are determined by continuous order-book matching; as new information arrives—weather model updates, seasonal shifts, or real-time atmospheric data—traders adjust bids and offers. Liquidity and trading volume concentrate around the most likely outcomes. The market price at any moment represents the marginal trader's belief, and wider spreads may indicate uncertainty or lower participation in less-favored temperature bands.
The market resolves on Jun 2, 2026, after the highest temperature in London on June 2 has been recorded and verified. Resolution hinges on official meteorological data, typically sourced from the UK Met Office or equivalent authoritative weather station. The winning outcome is the temperature bracket or exact reading that matches the verified high for that day. Traders should monitor the event terms closely to confirm which data source and measurement methodology will be used to settle all contracts.
Major weather pattern shifts, seasonal forecasts, and atmospheric pressure systems can significantly move odds. Updates from the UK Met Office, European weather models, or long-range climate outlooks often trigger repricing. Unusual jet-stream behavior, heat domes, or cold fronts approaching the UK in late May or early June will influence trader positioning. Real-time temperature readings in the days leading up to June 2 provide concrete data that narrows uncertainty. Media coverage of extreme weather events or climate anomalies may also shift market sentiment and liquidity toward higher or lower temperature outcomes.