Highest temperature in Paris on June 30?

Platform comparison

Market context

On 30 June 2026, the real-world event determining this market is the highest temperature recorded at Paris-Le Bourget Airport, measured in degrees Celsius. In prediction markets, a YES share pays out if the temperature falls within the specified range, while a NO share pays out if it does not. The crowd currently implies a 0% chance of YES, suggesting traders believe the temperature will not hit the target range, though this probability can shift as new data emerges.

Historical patterns in Paris show June highs typically range from 69°F to 74°F (21°C to 24°C), rarely exceeding 84°F (29°C), though extreme heatwaves have pushed temperatures far higher. France recently recorded its hottest day ever at 44.3°C in Landes, and Paris itself hit 40.6°C on 24 June 2026, shattering previous June records. Such anomalies frame why a 0% probability may be premature, as climate volatility has repeatedly defied long-term averages.

Traders should monitor daily weather forecasts from official French meteorological services and updates from Wunderground, which serves as the resolution source. Recent news highlights a brutal heatwave blistering western Europe, with temperatures soaring across France and Germany, indicating that atmospheric conditions remain unstable. Any sudden shifts in forecast models or official heat alerts could dramatically alter the implied probability, making real-time monitoring essential for accurate market assessment.

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Methodology

We track Highest temperature in Paris on June 30? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.