Highest temperature in Paris on August 11?

Platform comparison

Market context

Paris is dealing with a late-summer heat setup, and the live market is still pricing a fairly tight band around the low 30s Celsius even though the crowd is currently assigning **0%** to YES. AccuWeather’s Paris forecast shows **32°C** as the expected high for 11 August, while The Weather Network also points to **32°C**, suggesting the market’s leading outcome is aligned with mainstream forecast models rather than an outlier hot extreme.[1][6][12] Polymarket’s own order book is concentrated in the **32°C** and **33°C** buckets, implying traders expect a high that sits near the local forecast ceiling rather than a surprise breakout.[3]

That is best read against Paris’ August climatology, where average highs are in the mid-20s Celsius but one-day spikes into the low-to-mid 30s are common enough to matter for settlement.[4][8][14] The historical record for 11 August in Paris reaches **39.5°C**, so the contract is not asking whether heat is possible, only how far above seasonal norms the station will print on the day.[4] The current 0% crowd-implied price therefore looks more like a thin-liquidity or stale positioning artefact than a strong signal that the event is impossible, especially with several public forecasts sitting near the same temperature band.[1][3][6]

For traders, the main catalysts are the short-range temperature updates, any heat warnings, and whether the Paris-Le Bourget Airport station tracks the broader Paris forecast or deviates under local conditions; AccuWeather already shows a **Yellow Warning for Extreme High Temperature** for Paris.[12] The contract resolves from Weather Underground’s **Daily Observations** table rather than a summary high, so intraday station readings and the final logged maximum are the key variables, not the headline high shown elsewhere.[18] In cross-platform terms, sportsbook-style weather odds are not prominently available here, so the useful comparison is between the Polymarket price ladder and the public forecast consensus, which currently both cluster around **32°C** with limited dispersion.[1][3][6]

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

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 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 Best Prediction Markets 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.