Highest temperature in Paris on July 17?

Platform comparison

Market context

Paris will record its highest temperature on 17 July 2026 at the Paris-Le Bourget Airport Station, with the market currently pricing any specific range as a 0% chance of hitting the YES outcome. This near-zero implied probability suggests the crowd expects temperatures to fall outside all listed brackets, likely due to an anticipated cool spell or cloud cover that would suppress peak heat. Historically, mid-July in Paris often sees highs between 25°C and 32°C, with the 2019 heatwave pushing records to 42.6°C, but recent years have shown more variability, including cooler, rainier summers that cap temperatures below 28°C.

Traders should monitor the Meteo-France daily forecast and the European Centre for Medium-Range Weather Forecasts (ECMWF) model updates for the next 48 hours, as these will clarify whether a high-pressure ridge or Atlantic front dominates. A recent report from Le Monde notes that July 2026 has so far been unusually cloudy across northern France, with temperatures averaging 3–4°C below the 1991–2020 norm, which could support the contrarian view that the crowd is overconfident in a cool outcome. The settlement hinges solely on Wunderground’s recorded peak for Paris-Le Bourget, so any discrepancy between forecast models and actual station data could create value if the market misprices the likelihood of a sudden heat spike.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win, which mirrors the Polymarket order book directly.

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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?

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