Pronóstico: Highest temperature in Paris on June 26?

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Market context

Paris is currently enduring a historic heatwave, with temperatures peaking near 40°C through Thursday, 25 June, before a cooling trend is expected to begin on Friday, 26 June. This forecast suggests the highest temperature recorded at Paris-Le Bourget Airport on the settlement date will likely fall well below the extreme thresholds required for a "YES" outcome in the higher temperature ranges, aligning with the crowd-implied 0% probability. The cooling is described as gradual, with potential storms over the weekend, further reducing the likelihood of record-breaking highs on the specific day.

Historical data frames this probability by showing that while France recorded its hottest day ever at 44.3°C on 23 June 2026, the Paris-Le Bourget station typically sees lower peaks than the national average, and the specific cooling expected on 26 June breaks the plateau of extreme heat. Comparable cases from previous heatwaves indicate that once the peak passes, temperatures drop significantly, making the 0% probability for the highest ranges a rational assessment of the current meteorological trajectory. Traders should watch for official confirmation from Météo-France regarding the cooling trend, as any delay in the temperature drop could shift the probability, though current reports from Sortiraparis confirm the easing of the heatwave [1]. The settlement window ends at 12:00 UTC, meaning only morning temperatures count, which are typically lower than afternoon peaks even during heatwaves.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Paris on June 26? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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?

On PolyGram, 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?

PolyGram 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, PolyGram triggers a quick verification flow that finishes in minutes.