Highest temperature in Paris on July 13?

Platform comparison

Market context

Paris faces a scorching 13 July 2026, yet the market prices a record-breaking peak at only 1% YES, reflecting the rarity of extreme heat on this specific date. Historical data shows July highs in Paris typically range between 23°C and 25°C, rarely exceeding 31°C, with the national record of 42.4°C occurring on 25 July 2019, not mid-month [1][2]. The current low probability aligns with the absence of a confirmed heatwave for today, as recent two-week records show a high of just 26°C (79°F) on 13 July, well below the threshold for a record [3].

Traders monitoring this USDC contract on Polygon should watch real-time updates from Wunderground for the Paris-Le Bourget station, the official resolution source, while tracking any sudden shifts in regional heat alerts. Although France recently recorded its hottest day ever in June 2026 with a national thermal indicator of 29.8°C, this average does not guarantee a singular extreme spike at Le Bourget on 13 July [8]. The key dependency remains the live hourly feed; conditional tokens will resolve automatically once the 12:00 UTC settlement window closes, locking in the final Celsius reading regardless of subsequent forecasts.

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 Kalshi 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

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.

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 Kalshi UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.