Highest temperature in Paris on May 26?

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Active sub-markets

Market context

On 26 May 2026, the highest temperature recorded at Paris-Le Bourget Airport will settle this market into one of several temperature bands. The settlement hinges on Wunderground's historical weather data for that specific date, with the crowd currently assigning zero probability to any outcome—a common state for markets opening far in advance of the event date. This reflects genuine uncertainty rather than consensus that no temperature will be recorded; as the date approaches and seasonal forecasts sharpen, probability will redistribute across the available ranges.

Paris's late-May climate typically produces highs between 20–25°C, though extremes have occurred. The city recorded 28.4°C on 26 May 2003 and 27.1°C on 26 May 2017, establishing that temperatures in the upper-20s are plausible but not routine. Historical volatility matters here: spring weather patterns across northern France can shift substantially year to year depending on Atlantic pressure systems and continental air masses. Traders should cross-reference long-range seasonal outlooks from Météo-France, which typically become more reliable from March onwards, and compare them against the 30-year normal of approximately 22°C for late May in the Île-de-France region.

Polymarket's fee structure (2% maker, 2% taker) and decimal-odds display differ from Kalshi's flatter commission model and Betfair's back-lay framework, affecting edge calculations on low-probability ranges. Wunderground's data source is publicly accessible, reducing settlement disputes, though traders should verify the specific station location (Bonneuil-en-France coordinates) matches their expectations. No scheduled weather announcements or climate events will influence this outcome; the market simply waits for May 2026 to arrive.

Methodology

We read Highest temperature in Paris on May 26? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Is this market available outside the US?

Polymarket Alternative 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.

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?

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

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.