Highest temperature in Paris on July 14?

Platform comparison

Market context

The market tracks the peak temperature recorded at Paris-Le Bourget Airport on 14 July 2026, resolving to the specific Celsius range containing that day’s highest reading. With settlement closing at noon UTC on the event date, the current 0% implied probability for a “YES” outcome reflects a binary framing error; the market actually distributes across multiple temperature bands, with 34°C holding 47% and 35°C at 43% [1]. This dispersion aligns with historical July patterns in Paris, where daily highs typically average 26°C but can swing between 20°C and 43°C depending on atmospheric conditions [4].

For a programmatic trader, the key is to model the probability distribution rather than treat this as a yes/no bet. Historical data shows that mid-July heatwaves in Paris often push temperatures into the 33–36°C range, making the current frontrunners statistically grounded [4]. A bot would ingest Wunderground’s daily history for LFPB to calibrate its prior, then update dynamically as forecast models converge on the settlement window. The catalysts to monitor include the European Centre for Medium-Range Weather Forecasts (ECMWF) 10-day ensemble runs and any official Météo-France heatwave alerts, which frequently precede sustained high-temperature events. Recent coverage from the BBC confirms current conditions at Le Bourget are 21°C with falling pressure, suggesting no immediate heat spike, but the 10-day outlook remains the critical dependency for position sizing [2].

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Paris on July 14? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK 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.