Highest temperature in London on July 5?

Platform comparison

Market context

The real-world event this market tracks is the peak air temperature recorded at London City Airport on 5 July 2026, measured in degrees Celsius. In prediction markets, a YES share wins if the highest temperature falls within the specific range you selected, while a NO share wins if it lands outside that range. Currently, the crowd implies a 0% chance for the YES outcome on the lowest temperature bracket, suggesting traders expect the day to be significantly warmer than the minimum threshold.

Historical data frames this low probability clearly: July is London’s hottest month, with average highs around 22°C and frequent spikes above 30°C during heatwaves. Recent Met Office forecasts for London City Airport indicate maximum temperatures reaching 29°C, while AccuWeather’s July 2026 outlook for the station shows daily highs ranging from 29°C to 37°C. Such consistent warmth makes a result below 24°C highly improbable, aligning with the market’s current pricing.

Traders should monitor daily weather bulletins from the Met Office and live updates from Wunderground, the official resolution source. Key catalysts include incoming forecasts for southerly winds, which typically bring warmer air, and any announcements of severe thunderstorms that could temporarily lower temperatures. The National Weather Service has already noted clusters of severe thunderstorms and expected temperature records for the area, meaning volatility could shift the peak temperature rapidly. Watch the 5 July forecast closely, as a dry, settled evening with breezy coastal winds may sustain higher daytime peaks.

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Methodology

This page reviews Highest temperature in London on July 5? 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 Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Market UK. 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.

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 Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.