Pronóstico: Highest temperature in London on July 6?

Platform comparison

Market context

The highest temperature recorded at London City Airport on 6 July 2026 will determine the outcome of this prediction market, with the current crowd-implied probability sitting at 0% for the YES position. Polymarket prices this contract today at 0% on the USDC/Polygon chain, reflecting a market consensus that the peak temperature will not reach the specified threshold, despite conditional tokens suggesting thin volume and potential for rapid repricing as NWP model updates arrive.

Historical data frames this probability sharply: London’s highest ever observed temperature was 40.2°C at Heathrow on 19 July 2022, while the highest daily minimum recorded in Kenley was 25.8°C on the same day[1]. Recent forecasts for 5–7 July 2026 indicate a significant heatwave with temperatures climbing to 31–32°C, accompanied by isolated thunderstorms and high UV levels[2]. The Met Office confirms a maximum of 32°C for London City Airport today, with dry conditions and strong sunshine[6].

Traders should monitor real-time Wunderground data for the official peak, as well as any sudden shifts in storm intensity that could suppress temperatures below the threshold. The settlement window ends at 12:00 UTC on 6 July 2026, and the resolution source is the highest temperature recorded for all times on that day at London City Airport via Wunderground. With heat building day by day and minimal overnight cooling, the key dependency is whether the afternoon peak exceeds the market’s implied range before the storm front arrives on Sunday[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in London on July 6? 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 Polymarket Qué Es, 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.

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'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 Polymarket Qué Es trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.