Pronóstico: Highest temperature in London on August 14?

Platform comparison

Market context

On 14 August 2026, the highest temperature recorded at London City Airport will fall into one of several defined ranges, measured in degrees Celsius via Weather Underground's Daily Observations table. The market currently prices all temperature outcomes at 0% YES, reflecting the settlement window's closure date and the absence of real-time pricing data for an event over eighteen months away. This contract trades on Polygon as conditional USDC tokens, with resolution tied explicitly to the Daily Observations dataset rather than the Day High & Low summary—a distinction that matters when Weather Underground's stations occasionally report conflicting figures.

Historical August temperatures at London City Airport show considerable variation. The station recorded 32.3°C on 7 August 2022 and 31.9°C on 19 August 2023, whilst cooler Augusts have produced highs in the mid-to-high 20s Celsius. The Met Office's long-term climate data indicates August averages around 20–21°C for London, though individual days frequently exceed 25°C. These precedents suggest the market's current zero probability reflects technical factors—such as the settlement window having closed—rather than meteorological impossibility.

Traders monitoring this contract should track the UK's seasonal weather patterns as summer 2026 approaches, particularly Atlantic pressure systems and jet stream positioning that influence August temperatures. The Met Office issues seasonal outlooks three months in advance; their July 2026 forecast will provide the first substantial signal about whether anomalous heat or typical conditions are expected. Any significant climate or atmospheric anomalies reported between now and mid-2026 could shift how traders price temperature ranges once the market becomes actively tradeable.

Methodology

This page reviews Pronóstico: Highest temperature in London 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 Polymarket Qué Es, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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.

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.

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.