Highest temperature in London on July 26?

Platform comparison

Market context

On 26 July 2026, the highest temperature recorded at London City Airport will determine which range this market resolves to. The settlement window closes at midday UTC, meaning only temperatures recorded up to that point count; afternoon peaks later in the day will not affect the outcome. Wunderground's historical data for this specific station forms the authoritative source, accessible via the gear-icon toggle between Celsius and Fahrenheit scales.

London's July climate typically peaks between 20–24°C, though heatwaves can push readings into the high 20s or low 30s. The 2022 summer saw extreme temperatures across the UK, with London recording 40.3°C in early July—an outlier driven by sustained continental air masses. More representative recent Julys have seen highs of 22–26°C. The 0% crowd probability suggests traders are either uncertain about range placement or treating this as a calibration test; on Polymarket, such markets often show compressed odds early, whereas Kalshi's decimal-odds format and Betfair's lay functionality can reveal sharper disagreement between buyers and sellers on tail outcomes.

Traders should monitor the Met Office's extended forecast for late July 2026 as the date approaches; any Atlantic low-pressure systems or high-pressure ridges building over continental Europe will signal whether conditions favour typical summer temperatures or anomalous heat. The timing of the settlement window at 12:00 UTC is material—if a cold front arrives on the 26th, morning readings may anchor lower than afternoon potential, creating asymmetry between early and late-day traders' expectations.

Methodology

This page compares Highest temperature in London on July 26? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.