Highest temperature in Paris on May 26?

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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 relies on historical data from Wunderground's archive for that specific station, with the final reading locked in once the day closes and meteorological records are published. This is a straightforward weather outcome with no discretionary interpretation—the thermometer reading either falls within a given range or it does not.

Late May in the Paris region typically sees mean highs around 20–22°C, with historical extremes occasionally reaching 28–30°C on warmer years. The 0% crowd probability suggests traders are either awaiting clearer seasonal forecasts or treating this as a placeholder market pending activation. Comparable May weather events at Le Bourget show considerable variance year-to-year; the 2003 heatwave saw exceptional readings, whilst cooler springs have produced highs in the mid-teens. Current probability distribution likely reflects uncertainty rather than conviction that temperatures will fall outside typical bounds.

Traders should monitor European weather models from Météo-France and ECMWF as May 2026 approaches, particularly any signals of early summer heat or Atlantic low-pressure systems. Seasonal climate outlooks released in April will provide directional guidance on whether the month trends warmer or cooler than the 30-year average. USDC settlement on the btc-prediction.bet platform will execute once Wunderground's historical record is finalised and verified, typically within 48 hours of the settlement window close.

Methodology

This page reads Highest temperature in Paris on May 26? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Is this market available outside the US?

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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 does it cost to trade on BTC Prediction?

Zero. BTC Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, BTC Prediction 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.