Highest temperature in Paris on June 22?

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Market context

Paris is the key exposure here because the contract settles on the highest temperature recorded at Paris-Le Bourget Airport, not on a citywide average or the evening reading. June in Paris is usually warm rather than extreme: average daily highs rise from about 69°F to 74°F, and temperatures above 84°F are described as rare in the month[1]. That backdrop helps explain why a 0% yes price can persist when the market is effectively asking for a very specific hot-day outcome rather than just a normal summer high[1][2].

Comparable June heat episodes matter more than the long-run average. Paris has a history of sharp summer spikes, and France has seen June heatwave records broken in recent years, including 2022, when continental Europe experienced unusually intense early-summer heat[2][6]. More recently, reporting on 21 June 2026 said temperatures in Paris could rise above 40C for the first time on a June day, with France holding crisis talks as a broader European heatwave intensified[3]. That kind of setup is the main reason traders should not read a low implied probability as a statement about climatology alone.

For catalysts, the focus should stay on official forecasts and any same-day updates that affect whether heat peaks before the noon UTC settlement window closes. The contract uses the Paris-Le Bourget Airport Station reading, so timing of the maximum matters as much as the maximum itself; a late-afternoon spike would not help if it comes after settlement. Paris also has a recent pattern of exceptional warmth, including a May heat streak that saw temperatures reach 33C and remain above 32C for several days, which shows how quickly conditions can escalate when blocking high pressure sits over northern France[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Sport Prediction, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Sport Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Sport Prediction triggers a quick verification flow that finishes in minutes.