Highest temperature in Paris on June 22?

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Market context

Paris’s daytime peak on the airport station is trading as a **heavy favourite for a mid-to-high 30s Celsius outcome**, but the market is currently pricing an almost blank **0% yes probability**, which is an obvious outlier rather than a normal weather view. On the exchange, the consensus has clustered around **37°C and 38°C** as the main landing zones, with the book effectively saying the distribution is concentrated there rather than around anything cooler or extreme. The value angle is therefore not “calling a shock”, but whether the crowd is overconfident on exactly how hot the day can get at Paris-Le Bourget before the afternoon maximum settles.

For framing, Paris in June usually sees far lower highs than the current market centre, with average daily maxima around the low-to-mid 20s Celsius and only rare excursions into the 30s.[2][3] That makes the current setup more akin to a heatwave handicap than a normal summer forecast: when conditions favour an air-mass surge, the upside can move quickly, but the market still tends to anchor on the most recent hot spell rather than the broader seasonal baseline. Reuters reported French weather forecasters warning of temperatures reaching record highs in the run-up to Monday, with 37 to 42 degrees Celsius flagged in the broader national picture, which supports the idea that the favourite remains the hotter bins rather than a mild or average finish.[4]

The key catalysts are short-term meteorological, not event-driven: the trader focus is on whether the hot air mass persists through the midday-to-afternoon window used to capture the day’s maximum at Paris-Le Bourget, and whether cloud, wind shift or thunderstorm timing trims the peak before settlement. Because the resolution source is a station-specific daily high from Wunderground, small changes in the local afternoon profile matter more than citywide averages or nightly minima. In handicapper terms, the favourite is still the hottest bracket, but the contrarian value sits in any underweighted bin just below the consensus if the peak arrives earlier, weaker, or slightly off-station.

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 Who Will Win 2026 — 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.

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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.

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