Highest temperature in Paris on July 2?

Platform comparison

Market context

The highest temperature recorded at Paris-Le Bourget on 2 July 2026 will determine this market’s outcome, with the crowd currently pricing a YES result at 0%. On Polymarket, this contract trades as a conditional token on the Polygon network, settled in USDC, where the zero probability reflects a belief that temperatures will not breach the upper threshold required for a win.

Historical data frames this near-zero probability with stark clarity: Paris’s all-time record stands at 42.6°C, reached on 25 July 2019, and temperatures above 40°C have occurred only three times in the capital’s history[1]. While a powerful heatwave is forecast to hit France in early July 2026, with southern regions expected to reach 38–41°C and Paris likely seeing 35–38°C, meteorologists note that even peak daytime highs may not exceed 42°C in the north[2]. The current market stance aligns with the rarity of extreme heat in Paris during early July, despite the broader European heat context.

Traders should monitor Météo-France’s daily updates and the timing of the warm air influx from North Africa, which peaks around the summer solstice and could push Parisian temperatures toward 40°C[1]. Any deviation in forecast models suggesting a stronger northerly flow or delayed cooling could shift the probability, but current schedules indicate a relative temperature drop mid-week before another warm surge[1]. The settlement window closes at 12:00 UTC on 2 July 2026, so real-time Wunderground data for Paris-Le Bourget will be the definitive resolution source.

Sources: 1 · 2 · 3 · 4 · 5

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 PolyGram, 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

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 PolyGram. 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.

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.

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