Highest temperature in Wuhan on July 19?

Platform comparison

Market context

Wuhan's summer heat will peak on 19 July 2026, with the highest temperature recorded at Tianhe International Airport Station determining the settlement outcome. The airport weather station serves as the official reference point for the city's meteorological data, making historical patterns from this specific location essential for calibration. July typically ranks as Wuhan's hottest month, with mean daily highs around 32–34°C, though extreme readings regularly exceed 37°C during heat waves.

The 0% crowd probability reflects either market illiquidity or incomplete specification of the temperature bands available for trading. Wuhan's July extremes have historically ranged from 35°C to 41°C depending on monsoon activity and high-pressure systems. The 2013 heat wave pushed readings to 43°C; conversely, cooler Julys have settled around 33–35°C when tropical systems bring moisture and cloud cover. Traders should cross-reference Wunderground's historical daily maxima for Wuhan ZHHH station across the past decade to establish baseline volatility and frequency distributions for each temperature bracket.

Programmatic traders monitoring this market should integrate real-time atmospheric pressure data from the China Meteorological Administration and track the East Asian summer monsoon forecast updates, typically issued monthly by the Japan Meteorological Agency. Mid-July 2026 positioning depends on whether the Western Pacific subtropical high extends northward—a pattern that intensifies heat—or whether monsoon troughs bring cooler, wetter conditions. Weather model consensus from GFS and ECMWF runs, available 10–14 days before settlement, will sharpen probability estimates substantially more than current crowd signals.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Polymarket Review UK. 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 Polymarket Review UK 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.