Highest temperature in Paris on June 23?

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Market context

On 23 June 2026, the real-world event determining this market is the highest temperature recorded at Paris-Le Bourget Airport, measured in degrees Celsius. In prediction markets, a YES share pays out if the outcome falls within the specified temperature range, while a NO share pays out if it does not. The current crowd-implied probability of 0% for YES suggests traders believe the temperature will not reach the threshold in question, despite the exceptional early heat wave currently sweeping Europe.

Historical data frames this probability: average June highs in Paris range from 69°F to 74°F (21°C to 23°C), rarely exceeding 84°F (29°C) [1]. However, France has just recorded its hottest day ever, with temperatures surpassing 104°F (40°C) across the country [2], and extreme records like 42.4°C in Paris during July 2019 [3]. This anomaly means the 0% probability may reflect a specific range threshold rather than a denial of heat, as the national thermal indicator recently hit 29.8°C [4].

Traders should monitor the persistence of this heat wave, as forecasts predict extreme conditions lasting until the week’s end with highs above 104°F in many areas [2]. Key catalysts include official Meteo France announcements on temperature trends and the daily Wunderground reports for Paris-Le Bourget, which will settle the market [5]. The settlement window ends 12:00 UTC on 23 June 2026, so real-time updates from the station are critical for assessing whether the temperature breaches the range [6]. Recent data shows a peak of 96.7°F (36°C) on 21 June 2026 near Paris, indicating the potential for high readings [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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

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 Prediction Market UK, 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?

Prediction Market UK 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 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, Prediction Market UK 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.