Highest temperature in Beijing on July 14?

Platform comparison

Market context

Beijing's summer heat peaks in mid-July, with daily maxima typically ranging from 29°C to 35°C during this period. The 14th falls within the city's most intense thermal window, when subtropical air masses dominate and afternoon thunderstorms remain infrequent enough to sustain sustained high temperatures. Historical records from Beijing Capital International Airport—the official settlement source—show considerable year-to-year variance; July 2022 recorded a peak of 40.3°C on the 18th, whilst July 2023 peaked at 36.1°C on the 13th. This volatility reflects the interplay between Siberian high-pressure systems and tropical moisture patterns, making any single day's outcome difficult to predict with confidence months in advance.

Traders evaluating this market programmatically should monitor China Meteorological Administration forecasts released in early July, which typically offer reliable 10-day outlooks. The China National Weather Service publishes daily updates via its official channels; heatwave alerts, when issued, often precede temperature spikes by 48–72 hours. Urban heat island effects around the airport station can inflate readings by 1–2°C relative to surrounding areas, a systematic bias worth accounting for in conditional order logic. The settlement mechanism depends entirely on Wunderground's historical database pull from ZBAA station records, which occasionally lag by 24–48 hours but rarely contain errors once finalised.

Methodology

We track Highest temperature in Beijing on July 14? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

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