Highest temperature in Paris on July 12?

Platform comparison

Market context

Paris is bracing for a July 12 heat peak, with the city’s Paris-Le Bourget Airport Station expected to record temperatures near 35°C or 36°C. On Polymarket, this weather contract trades on Polygon using USDC, where conditional tokens currently price the 35°C outcome at 48% and 36°C at 47%, while the specific “YES” binary for any extreme outlier sits at 0% implied probability. Traders holding these positions are effectively betting on-chain that the day’s high will fall within these narrow bands, with settlement locked to Wunderground’s official daily record for LFPB.

Historical context from the 2026 European heatwaves frames this pricing: France already recorded its hottest day since 1947 on 23 June, with Pissos hitting 44.3°C and Paris’ Charles de Gaulle Airport reaching 42°C (104°F) on 24 June [4][5]. Given that July 2026 forecasts show daily highs ranging from 73°F to 102°F (23°C to 39°C) with an average of 85°F (29°C), the market’s concentration around 35–36°C reflects a realistic mid-range heat scenario rather than an extreme anomaly [3]. The 0% probability on outlier outcomes aligns with the absence of a second record-breaking spike in early July so far.

Traders should monitor Météo-France’s daily bulletins and AccuWeather’s updated July 12 forecast for Paris, as any sudden shift in cloud cover or wind patterns could alter the day’s peak [3]. With the settlement window ending 12:00 UTC on 12 July 2026, the final resolution depends entirely on Wunderground’s recorded high for Paris-Le Bourget, making real-time weather updates the primary catalyst for position adjustments before the deadline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.