Highest temperature in London on July 13?

Platform comparison

Market context

London City Airport is forecast to reach a high of 27°C today, with the market assigning only a 4% probability that the peak temperature will exceed 30°C. This tight pricing reflects the station’s typical July behaviour, where the average high sits around 22°C and extremes above 30°C are rare but not impossible [1]. Historical data shows London’s absolute record is 40.2°C at Heathrow in July 2022, yet EGLC rarely matches such spikes due to its urban, riverside location [5]. The current 4% YES price aligns with comparable Polymarket contracts for mid-July London heat, where outcomes above 30°C consistently trade below 10% unless a confirmed heatwave is underway [2].

Traders should monitor the Met Office’s daily heatwave bulletins and the National Severe Weather Warning Service for any escalation in high-pressure systems over the UK, as these are the primary catalysts for temperatures breaching 30°C at EGLC [3]. The settlement depends entirely on Wunderground’s recorded maximum for 13 July 2026 at EGLC, so real-time updates from BBC Weather and The Weather Network for London City Airport will be critical as the day progresses [6][7]. With the settlement window closing at 12:00 UTC today, on-chain liquidity in USDC on Polygon will determine final pricing, and conditional token positions will resolve automatically once the official data is published.

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 Polymarket Scam?, which mirrors the Polymarket order book directly.

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

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 Polymarket Scam?. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Scam? 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.