Highest temperature in Paris on July 20?

Platform comparison

Market context

Paris is about to face an intense heatwave on 20 July 2026, with forecasters expecting temperatures to soar between 36°C and 39°C at the Paris-Le Bourget Airport Station, potentially climbing to 40°C on some afternoons [4]. This extreme heat is part of a sustained canicule expected to last several days, a pattern consistent with mid-July conditions where average highs typically reach 25–27°C but heatwaves frequently push readings to 35–40°C [2]. The current crowd-implied probability of 0% for any outcome above the lowest range appears to contradict these active forecasts, suggesting the market may be mispricing the likelihood of a severe heat event.

Historically, Paris has recorded temperatures at or above 40°C only a few times, making such an event rare but not unprecedented during mid-summer heatwaves [4]. Comparable cases from recent years show that when Atlantic cooling fails to arrive promptly, temperatures remain elevated well into the evening, with minimal variation between day and night [2]. The 0% probability currently assigned to higher temperature ranges ignores this historical volatility and the specific forecast warning that cooler air from the Atlantic may only reach Paris by the end of the week, leaving 20 July exposed to peak heat [4].

Traders should monitor daily weather updates from Wunderground and local French meteorological services for any sudden shifts in the Atlantic cooling timeline, as delays could extend the heatwave through the settlement window [2]. Key catalysts include official announcements regarding the timing of the cooler air mass and real-time temperature logs from the Paris-Le Bourget station, which will determine the market’s resolution [1]. With forecasts explicitly predicting a multi-day heatwave peaking around this date, the current pricing presents a significant divergence from observable meteorological data.

Sources: 1 · 2 · 3 · 4

Methodology

Football-specific comparison page for Highest temperature in Paris on July 20?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

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Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.