Highest temperature in Paris on June 23?

Platform comparison

Active sub-markets

Market context

The real-world event centres on the highest temperature recorded at Paris-Le Bourget Airport on 23 June 2026, with the market currently assigning a 0% probability to any outcome exceeding 35°C. This stark consensus contrasts sharply with recent meteorological data, as Euronews reported that Paris could reach 40°C mid-week, having already broken its June record at 38.4°C earlier in the month [3]. Historical precedents from the 2022 and 2023 heatwaves show that June temperatures in Paris frequently surpass 35°C, yet the current 0% implied probability suggests traders are either ignoring these comparable extremes or betting on a specific cooling anomaly that contradicts the broader European heatwave forecast [6].

Traders must monitor the French weather agency’s daily bulletins and the scheduled release of Wunderground’s hourly data, which serves as the definitive resolution source for this market. The New York Times highlighted that forecasters expect unprecedented 40°C highs in France this week, making the timing of these announcements critical for assessing the validity of the current 0% probability [6]. While German GlüStV regulations and US CFTC reach create a complex regulatory backdrop, the “no-KYC up to $1,500” accessibility rule allows immediate participation in this specific market without identity verification, provided the trade remains under the threshold. This accessibility, combined with the $37.5K volume already recorded, underscores the market’s liquidity despite the regulatory friction [8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Tax 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.

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 Tax UK?

Zero. Polymarket Tax UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.