Highest temperature in Paris on August 14?

Platform comparison

Market context

Paris is forecast to experience warm conditions on 14 August 2026, with meteorological models currently suggesting a high in the low-to-mid 20s Celsius. The 0% crowd probability reflects either extreme confidence in a cooler outcome or insufficient trading activity to establish a meaningful price. Over the past 48 hours, European weather models have shown modest cooling compared to earlier forecasts, with Atlantic systems potentially moderating peak temperatures across northern France during mid-August.

August temperatures in Paris historically peak between 24–27°C, with readings above 30°C occurring in roughly one-third of years during this period. The 2003 heatwave saw Paris reach 40.3°C on 4 August, whilst more typical recent Augusts have produced highs in the 25–28°C range. The market's zero probability suggests traders are pricing confidence that temperatures will remain below the lowest threshold offered, though the specific range boundaries are not disclosed in available documentation.

Traders should monitor the European Centre for Medium-Range Weather Forecasts (ECMWF) and Météo-France updates through early August, as these typically stabilise forecasts 10–14 days ahead. High-pressure systems moving across the continent or Atlantic low-pressure intrusions could materially shift outcomes. Weather Underground's Daily Observations table at Paris-Le Bourget Airport will provide the settlement reference; this station's readings occasionally differ from central Paris measurements, which may influence resolution outcomes if marginal temperature bands are involved.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.