Pronóstico: Highest temperature in Paris on July 9?

Platform comparison

Market context

The underlying real-world event is the peak temperature expected at Paris-Le Bourget Airport on 9 July 2026, a date currently sitting at a 0% implied probability for hitting the target range in the crowd market. On Polymarket, this contract trades with USDC on the Polygon network, where conditional tokens reflect the market’s near-total dismissal of the outcome despite the on-chain mechanics allowing precise settlement. The current pricing suggests traders believe the temperature will fall outside the specific range, yet the market remains open for conditional token swaps until the settlement window closes at 12:00 UTC on 9 July 2026.

Historical precedents frame this low probability with caution, as the 2026 European heatwaves have already shattered records across the continent. Forecasts indicate a powerful heatwave striking France in early July 2026, with Paris and northern regions likely experiencing daytime highs between 35–38°C, while feels-like temperatures climb even higher[1]. Southern France could reach 38–41°C, and meteorologists warn that daytime highs might hit 42°C in the hottest spots, with nighttime temperatures staying above 25°C to prevent cooling[1]. This pattern of sustained extreme heat, lasting at least 7 to 10 days, challenges the assumption that the target range is impossible[1].

Traders must monitor the Meteo France red heat wave alerts and the progression of the El Niño-driven weather system, which has issued warnings for 54 departments indicating high temperatures will persist around the clock[4]. The catalyst is the confirmed arrival of this heat dome, which is expected to continue at least until the week’s end with daytime temperatures soaring to 40°C in numerous areas[4]. Recent reports confirm France recorded its hottest day ever as Europe withers in this heat wave, with the national thermal indicator reaching 29.8°C as an average across 30 stations[4]. The dependency on Wunderground data for the final resolution means traders should watch for real-time updates on the Paris-Le Bourget station as the heatwave intensifies.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Paris on July 9? 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

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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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 Polymarket Qué Es 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.