Highest temperature in Paris on June 26?

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Market context

France is currently engulfed in a record-breaking heatwave, with the national meteorological service Meteo France issuing red alerts for 54 departments as temperatures persist around the clock[3]. The country has already shattered its all-time high, recording 44.3°C on June 23, 2026, just days before this market’s settlement date[6]. This extreme backdrop directly contradicts the current crowd-implied probability of 0% for any outcome, suggesting a significant mispricing in the market[1].

Historical precedents from this week show Paris-Le Bourget tracking closely with national peaks; June 24 alone set a new national record, surpassing the previous day’s extreme[8]. With daily highs in Paris for June 2026 forecast between 81°F and 96°F (27°C–35°C), and the national average climbing well above 40°C, the likelihood of temperatures exceeding 36°C is substantial[4]. The Polymarket leading outcome of 36°C at 64% aligns with this trajectory, further undermining the 0% probability assigned to the event[1].

Traders should monitor real-time updates from Wunderground for the Paris-Le Bourget station, as the settlement source relies on its highest recorded temperature for all times on June 26[1]. Any deviation from the national trend or a sudden drop in Meteo France’s red alert status could shift odds, though current data suggests persistence[3]. The settlement window ends at 12:00 UTC on June 26, 2026, making immediate weather reports critical for final resolution[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on June 26? 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 PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

What does it cost to trade on PolyGram?

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

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.