Highest temperature in London on July 14?

Platform comparison

Market context

London's weather on 14 July 2026 will be measured against historical July temperatures at City Airport, where records show the station typically records highs between 20–28°C during mid-summer. The current zero probability assigned to this market suggests traders are either awaiting forecast data or treating the outcome as genuinely uncertain until closer to the settlement date. July temperatures in London have historically peaked above 30°C on rare occasions—the UK recorded 40.3°C in July 2022, though London itself typically remains several degrees cooler than inland extremes.

The Met Office and other forecasters will publish increasingly precise outlooks as July 2026 approaches, with meaningful updates arriving in the week preceding the 14th. Current seasonal patterns and any Atlantic weather systems developing in early July will determine whether conditions favour a cooler-than-average day or a heat spike. Traders should monitor official forecasts from mid-June onwards, as the probability distribution will likely shift sharply once deterministic models converge on a specific scenario rather than remaining speculative.

The resolution depends entirely on the highest temperature recorded at London City Airport Station on that date, measured in Celsius and reported through Wunderground's historical weather database. This removes ambiguity around location or measurement method, though traders should verify the specific station's typical recording range to calibrate expectations against the available temperature brackets in the market.

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 Prediction Today, which mirrors the Polymarket order book directly.

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

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.

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.

Do I need to KYC for this market?

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