Highest temperature in Paris on July 6?

Platform comparison

Market context

The underlying real-world event is the peak temperature recorded at Paris-Le Bourget Airport on 6 July 2026, a date currently shrouded in a 0% crowd-implied probability for any specific outcome, despite the market frontrunner being 34°C at 54% on Polymarket. This stark divergence between the abstract probability and the on-chain conditional tokens, settled in USDC on the Polygon network, frames the current trading landscape. Historical precedents suggest that Paris has endured extreme heat, with the all-time record of 42.6°C set in 2019, while recent weeks have seen temperatures near 41°C in the capital during a western European heatwave that triggered red alerts across France, the UK, and Spain[1][4]. Such comparable cases indicate that a 34°C peak is not merely plausible but aligns with the current trajectory of a heatwave pushing temperatures well above seasonal averages, as noted in recent forecasts for northern France[3].

Traders must monitor the scheduled release of Météo-France updates and the persistence of the current heatwave, which is projected to extend into eastern Europe with severe warnings for Poland and Hungary[1]. The primary catalyst is the influx of warm air from North Africa, which could push Parisian peaks toward 40°C if the heatwave intensifies further, as anticipated by forecaster Aemet for northern Spain[1]. Recent news from the BBC confirms that millions are enduring extreme temperatures, with red heat alerts still in effect, suggesting that the weather dependency for this contract remains highly volatile and dependent on the final hours of the settlement window[1]. The market’s current pricing reflects a high probability of 34°C, yet the underlying meteorological data points to a potential for even higher extremes if the heatwave does not respite as predicted by Friday[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Paris on July 6? 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

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Legit? 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.