Highest temperature in Paris on July 14?

Platform comparison

Market context

Paris-Le Bourget Airport is set to record its highest temperature for 14 July 2026, with the market currently pricing a 0% chance of any outcome above the implied baseline. Over the last 24 hours, the crowd has shifted decisively toward the 34°C and 35°C ranges, which now command 47% and 43% of the probability respectively, reflecting a tightening consensus around a hot but not extreme mid-July day [2]. This realignment suggests traders are reacting to updated local forecasts that have downgraded earlier heatwave fears, pushing the implied probability of record-breaking highs to zero.

Historically, Paris July highs rarely exceed 88°F (31.1°C), with temperatures above 35°C occurring only during severe heatwaves like the 2026 event that forced early closures at the Louvre and Eiffel Tower [3][4]. The current 0% probability for higher ranges aligns with the pattern that such extremes are exceptional rather than routine, even as Europe recently experienced a heatwave peaking at 39°C in London [3]. The market’s dismissal of higher outcomes mirrors the rarity of Paris reaching 37°C or more, which has only happened on a handful of days in the past decade.

Traders should monitor the Met Office’s daily heatwave updates and Wunderground’s live temperature feed for Paris-Le Bourget, as any sudden spike could invalidate the current pricing [3]. The settlement window closes at 12:00 UTC on 14 July, so the final hour of data will be decisive. No new announcements are scheduled, but the Met Office’s Friday easing forecast suggests conditions may not sustain the peak heat seen earlier in the week [3].

Sources: 1 · 2 · 3 · 4

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Today. 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.

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.

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 Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.