Highest temperature in Paris on June 23?

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Active sub-markets

Market context

The real-world event is the peak daytime temperature recorded at Paris-Le Bourget Airport on 23 June 2026, a date that historically sits within Paris’s warmest June window. Current crowd-implied probability for a “YES” outcome in this prediction market is 0%, suggesting traders believe the temperature will not breach the contract’s threshold, likely a high range such as 40°C or above.

Historically, June highs in Paris average between 20.5°C and 23.5°C (69°F to 74°F), rarely exceeding 29°C (84°F), with the city’s all-time June record being 42.4°C on 28 June 2019 [1][2]. While France has seen extreme heatwaves, including 45.9°C in southern France in 2022, Paris itself has not recorded temperatures above 40°C in June since 2019, making a breach of a high threshold statistically improbable without a major climatic anomaly [4][5].

Traders should monitor Météo-France’s weekly forecasts for heatwave alerts and any sudden shifts in atmospheric pressure patterns that could trigger a Mediterranean heat surge. Recent data shows Paris entered an unprecedented May heat streak, reaching 33°C on 28 May, indicating early-season thermal volatility that may persist into June [7]. A key catalyst is the official release of the 2026 June heatwave outlook, expected in early June, which will clarify whether a record-breaking event is forecast [7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on June 23? 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 Best Prediction Markets 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

Where can I trade this market with the lowest fees?

On Best Prediction Markets UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Best Prediction Markets 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 does it cost to trade on Best Prediction Markets UK?

Zero. Best Prediction Markets UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.