Highest temperature in Paris on July 14?

Platform comparison

Market context

Paris will experience its peak daily heat on Bastille Day 2026, measured specifically at the Paris-Le Bourget Airport Station, with the market currently pricing a 0% chance for any outcome outside the implied ranges. The crowd has heavily concentrated its bets on the 34°C to 35°C bracket, assigning a 47% probability to 34°C and 43% to 35°C, effectively treating higher extremes as negligible risks [1]. This tight clustering suggests traders view the atmospheric conditions for mid-July as stable, leaning on recent climate models that project a return to near-average summer highs rather than a record-breaking heatwave.

Historical data from the last decade shows that Paris temperatures on 14 July typically fluctuate between 25°C and 32°C, with the 2022 and 2023 summers briefly pushing into the mid-30s during broader European heat events. The current 0% probability for outcomes above 35°C aligns with these comparable cases, where sustained highs above 36°C on this specific date have been rare anomalies rather than the norm. Traders are effectively betting that the 2026 weather pattern will not deviate significantly from the established historical mean for the French capital during the national holiday.

Key catalysts to monitor include the Met France seasonal forecast updates scheduled for release next week, which will detail the progression of the Atlantic ridge and any potential Mediterranean heat advection. A sudden shift in the European Centre for Medium-Range Weather Forecasts' ensemble models could rapidly alter the implied probabilities if a high-pressure system stalls over the region. Additionally, any declarations from the French Ministry of Ecology regarding heatwave preparedness levels could serve as a proxy for official temperature expectations, though the market currently leans on the consensus that conditions will remain within the 34°C–35°C window.

Sources: 1

Methodology

This page tracks Highest temperature in Paris on July 14? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

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Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

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Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.