Highest temperature in Paris on August 14?

Platform comparison

Market context

The market concerns the highest temperature recorded at Paris-Le Bourget Airport on 14 August 2026, with settlement based on Weather Underground's Daily Observations table. The crowd currently assigns zero probability to any outcome, suggesting either extreme uncertainty or insufficient liquidity rather than genuine confidence that temperatures will remain unmeasurable on that date.

August temperatures at Le Bourget typically range between 15°C and 28°C, with historical highs occasionally exceeding 30°C during heat waves. The 2003 European heat wave saw Paris reach 40.3°C in early August, whilst more recent summers have produced peaks in the 32–36°C band. The 0% implied probability reflects the market's nascent state rather than meteorological implausibility; traders have yet to price in seasonal norms or the range bins available for resolution. Value exists in assessing which temperature bracket aligns with long-range forecasts and typical August variability, rather than treating the outcome as unknowable.

Traders should monitor European summer weather patterns as August 2026 approaches, particularly Atlantic pressure systems and potential heat dome formation across continental Europe. The Met Office and Météo-France typically issue extended outlooks by late July that could shift consensus significantly. Any major climate pattern announcements—such as La Niña or El Niño transitions affecting European summer conditions—warrant attention, though such forecasts remain inherently uncertain at the two-year horizon. Early liquidity entry may reward those willing to price temperature ranges before mainstream attention arrives.

Methodology

This page reviews Highest temperature in Paris on August 14? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

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

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.

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%.