Highest temperature in Paris on June 22?

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Market context

Paris’s hottest reading on 22 June will be set by the daily maximum at Paris-Le Bourget Airport, so the relevant question is not citywide averages but whether the station reaches an unusually warm late-June peak before the 12:00 UTC settlement cut-off. June in Paris typically sees daily highs around 21–23°C, with Weather Spark putting the month’s usual range around 69–74°F and only rarely above 84°F, while Reuters reported French forecasters warning on 19 June of temperatures climbing into the mid-30s Celsius across parts of the country from Sunday at least through Tuesday.[1][2]

That backdrop helps explain why a 0% YES implied probability looks extreme relative to seasonal norms, unless traders believe the contract’s required bucket is high enough to exclude a modest warm spell or the day’s maximum will fall outside the settlement window. Paris has seen severe heat in recent years, including 33°C in late May 2026 and 42.4°C in the 2019 record, but those are outliers rather than typical June outcomes.[6][7] On a cross-platform basis, prediction-market pricing here appears far more sceptical than the broad weather narrative, with no sportsbook-style public line visible in the supplied material to anchor a direct odds comparison.

The main catalysts are the short-range forecast updates for Île-de-France, the timing of cloud cover, wind and any passing showers, and whether the warmest air arrives before or after noon UTC. Traders should also watch whether Météo-France and Reuters-style summaries continue to flag the current warm spell as a national heat event or whether local conditions around Le Bourget remain cooler than the broader Paris basin.[2] Because the market resolves to the highest temperature recorded on Wunderground for the station, even a brief spike in the early part of the day can matter more than the afternoon trend.[2]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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Resolution & payout

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FAQ

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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.

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