Highest temperature in Paris on June 23?

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Market context

On 23 June 2026, Paris-Le Bourget Airport will face the peak of a historic heatwave, with forecasts indicating temperatures could soar near 40°C, a level unprecedented for June in the capital. This real-world extreme defines the market, where the crowd-implied probability of a "YES" outcome sits at 0%, suggesting traders believe the temperature will not breach the specific threshold set for the contract.

Historical precedents and current data frame this near-zero probability as a potential mispricing, given that Paris already broke its June record with 38.4°C earlier this week, and forecasts for midweek peaks near 40°C are widely cited by major outlets like Euronews and The New York Times[4][6]. The heatwave plateau from Monday through Thursday creates a high-probability environment for record-breaking temperatures, challenging the current on-chain pricing that ignores the intensity of the current weather event.

Traders must monitor the cooling trend expected to begin Friday, 26 June, as the French weather agency warns that gradual relief may follow the peak, though storms could complicate the weekend outlook[1]. The primary catalyst is the confirmation of whether the 40°C peak materialises before the cooling begins, a dependency detailed in recent reports from Sortiraparis which highlight the extreme plateau through Thursday[1]. With USDC and conditional tokens on Polygon governing the settlement, the on-chain mechanics will resolve based on Wunderground data, making the timing of the temperature peak critical for any position taken before the 2026-06-23T12:00:00Z deadline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on June 23? 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 Polymarket Scam? — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Scam?, 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.

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.

What does it cost to trade on Polymarket Scam??

Zero. Polymarket Scam? 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, Polymarket Scam? 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.