Highest temperature in Paris on July 13?

Platform comparison

Market context

Paris is currently experiencing clear skies with a morning temperature of 79°F, setting the stage for the final hours of a market betting on extreme heat at Paris-Le Bourget Airport on 13 July 2026. The crowd-implied probability of a YES outcome sits at just 1%, suggesting traders view a record-breaking high as highly unlikely despite the region’s recent thermal volatility.

Historical data frames this low probability as rational, given that Paris’s July highs typically range between 23°C and 25°C, rarely exceeding 31°C [1]. While France recorded its national all-time peak of 45.9°C in southern Gallargues-le-Montueux recently, the capital’s urban record remains 42.4°C from July 2019 [2][4]. The divergence between national extremes and Paris-specific caps explains the sportsbook lines that heavily favour standard summer temperatures over outlier heat events for this specific date.

Traders should monitor the Meteo France heatwave bulletin for any escalation to red alerts, which would signal a shift in the settlement probability [10]. The market resolves based on Wunderground data for Paris-Le Bourget, making real-time station updates the primary catalyst rather than national averages [1]. With the settlement window closing at noon UTC, any late-morning temperature spike above 35°C would represent a significant deviation from the current 1% odds, though recent June peaks in the region only reached 36.7°C [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on July 13? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Best Prediction Markets UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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?

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