Highest temperature in Paris on July 2?

Platform comparison

Market context

The real-world event in question is the highest temperature recorded at Paris-Le Bourget Airport on 2 July 2026, measured in degrees Celsius and sourced from Wunderground. Long-term averages for Paris in July suggest a daytime maximum of 24°C with eight hours of sunshine, yet the current crowd-implied probability of 0% for a specific high range implies the market expects temperatures to fall well below extreme thresholds. Historical context shows Paris’s record high is 42.6°C, reached on 25 July 2019, with only three instances above 40°C in the capital’s history. Recent 2026 European heatwaves have pushed temperatures to 44.3°C in Landes and 40.9°C in Paris during June, indicating that while extreme heat is possible, it remains sporadic and geographically variable rather than a consistent July feature.

Traders approaching this market programmatically should monitor Météo-France’s daily forecasts for heatwave alerts, particularly red-level warnings that signal sustained high temperatures across 54 departments. A key catalyst is the influx of warm air from North Africa, which has previously driven peaks of 40°C in the Paris region during late June and early July. Recent reporting from Le Monde notes that France is bracing for an exceptional second heatwave beginning mid-June, with forecasts of 34°C to 38°C across the southwest to northeast, including Paris, and anticipated peaks of 40°C coinciding with the summer solstice. Conditional orders should be tied to updates on tropical nights—when temperatures do not drop below 25°C—as these often precede record-breaking daytime highs. The settlement window ending 2026-07-02T12:00:00Z requires real-time data ingestion from Wunderground, making automated scraping of the station’s daily history essential for accurate position management.

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Methodology

This page reviews Highest temperature in Paris on July 2? 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 Fees, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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