Highest temperature in Paris on July 15?

Platform comparison

Market context

Paris will experience its peak daily heat on 15 July 2026 at the Paris-Le Bourget Airport Station, with the market resolving to the Celsius range containing that maximum reading. The settlement relies exclusively on Wunderground’s historical daily data for LFPB, a standard meteorological benchmark for the region. With the crowd-implied probability for any specific outcome currently at 0%, the market reflects extreme uncertainty or a lack of sufficient long-range forecasting data to anchor a position.

Historically, mid-July in Paris often sees temperatures between 20°C and 30°C, though heatwaves have pushed readings above 35°C in recent years, such as the 42.6°C peak recorded in 2019. A 0% probability across all ranges suggests traders are either waiting for short-term model convergence or treating the event as too volatile for early positioning. Programmatic traders typically deploy conditional orders that trigger only when high-resolution ensemble forecasts from the ECMWF or NOAA narrow the variance, rather than betting on static long-horizon projections.

Key catalysts include the release of the latest European Centre for Medium-Range Weather Forecasts (ECMWF) seasonal updates and any sudden shifts in Atlantic pressure patterns that could drive a heat dome. Traders should monitor the daily 12:00 UTC model runs, as these often refine temperature anomalies by 2–3°C within a week of the event. Recent coverage from the Met Office highlights how Mediterranean air masses are increasingly influencing French summer peaks, a dependency that will likely dictate the final settlement range once short-term data matures.

Methodology

This page reviews Highest temperature in Paris on July 15? 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 Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

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 Polymarket Review UK. 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.

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.