Highest temperature in Paris on July 22?

Platform comparison

Market context

Polymarket currently prices this Paris temperature contract with the market split between **25°C and 26°C**, each at **50%**, so the book is leaning towards a warm but not extreme afternoon rather than a clear break higher. On Polymarket, that view is expressed in USDC on Polygon through conditional tokens, so each tick in the forecast is really a judgement on where the Paris-Le Bourget Airport Station’s highest recorded reading lands in the Wunderground daily history feed.

For context, Paris summer highs are often clustered in the mid-20s Celsius, and the historical average high for 22 July is **24.4°C**. A forecast source cited by Weather Journey put 22 July 2026 at **25.8°C**, which sits close to the current market’s boundary between the 25°C and 26°C ranges. Recent French heat has been notable too: Al Jazeera reported in early July that France had just logged its hottest June on record, reinforcing how quickly temperatures can run above seasonal norms during this part of the summer.

A trader should watch the afternoon evolution at Paris-Le Bourget rather than the calendar headline alone, because this market settles on the **highest temperature recorded on the day** at the designated station, not a citywide average or a noon snapshot. The main dependencies are the station’s actual readings, the timing of any late-day peak, and whether cloud cover or storm development suppresses the maximum before the settlement window closes.

Sources: 1 · 2 · 3

Methodology

We track Highest temperature in Paris on July 22? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.