Highest temperature in Wuhan on July 19?

Platform comparison

Market context

Wuhan's peak temperature on 19 July 2026 will be recorded at Tianhe International Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at midday UTC, meaning traders must account for the full calendar day's high before the market locks. July is consistently Wuhan's hottest month, with average highs around 33–34°C and extremes regularly exceeding 37°C during heat waves.

Historical records show Wuhan experiences intense summer heat driven by its inland Yangtze River basin geography and subtropical climate. The city recorded 40.3°C in July 2013 and has seen multiple days above 39°C in recent summers, particularly during 2020 and 2022. The 0% crowd probability on this market likely reflects uncertainty about which specific temperature band will be selected as the settlement range rather than scepticism about heat itself; traders may be waiting for the exact bracket definitions or historical precedent from comparable markets on other platforms. Kalshi's weather contracts typically use tighter ranges (1–2°C bands), whilst Betfair's lay odds structure can create different implied probabilities than Polymarket's decimal format, even when underlying forecasts align.

Traders should monitor China Meteorological Administration forecasts released in early July 2026 and watch for any announced heat warnings from Wuhan authorities. Seasonal patterns suggest late July often brings either sustained high pressure systems or monsoon interruptions; the specific date's position relative to these patterns will matter. Wunderground's historical data feed has proven reliable for airport-station settlements, though traders should verify the exact measurement protocol (shade temperature, time of recording) matches the market's implicit assumptions before committing capital.

Methodology

This page compares Highest temperature in Wuhan on July 19? 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

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

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.