Highest temperature in Paris on June 22?

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Market context

The underlying real-world event is a severe heatwave sweeping across Europe, with Paris-Le Bourget Airport expected to record temperatures between 38°C and 39°C on 22 June 2026, potentially exceeding 40°C for the first time in the city’s history. This extreme weather has triggered emergency crisis talks in France and widespread alerts in Germany, as meteorologists forecast peaks of 41°C in certain locations by Sunday.

Historical precedents frame the current 0% YES probability as highly counterintuitive; Paris recorded 42.4°C on 25 July 2019, and southern France hit 45.9°C on 19 June 2026, the hottest day in French history[8][9]. Polymarket’s conditional tokens on Polygon currently price the 37°C outcome at 49% and 38°C at 48%, reflecting real-time USDC trading that aligns with Météo-France’s ensemble runs[1][2]. These odds update continuously as traders buy and sell shares, capturing the collective view that 37–38°C is the most likely range.

Traders should monitor daily ECMWF updates and Météo-France bulletins, which consistently predict 38–39°C for Paris-Le Bourget[1]. The ABC News report from 21 June confirms temperatures could soar above 40°C, with 39–40°C spanning from southwestern France through Paris to Burgundy[4]. Key dependencies include the settlement window ending 12:00 UTC on 22 June and Wunderground’s official temperature data for all times on that day, which will resolve the market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on June 22? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Kalshi UK — the application we operate, where you trade directly against 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

Is this market available outside the US?

Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.

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.