Highest temperature in Beijing on July 20?

Platform comparison

Market context

The market tracks the peak temperature recorded at Beijing Capital International Airport on 20 July 2026, with settlement tied to Wunderground’s daily high for ZBAA. Today’s 0% YES probability implies the crowd expects the temperature to fall outside the specific range offered, likely due to the date falling during Beijing’s peak summer humidity when extremes are common but highly variable.

Historically, Beijing in July sees highs between 23°C and 31°C, with the month averaging 185 mm of rainfall, making it one of the wettest periods [1]. Comparable cases from recent years show that while temperatures can spike above 35°C during dry heatwaves, cloud cover and precipitation often cap highs near 30°C. A power-user evaluating this market programmatically would back-test Wunderground’s ZBAA history for 20 July across the last decade to identify the most frequent resolution bands, noting that the 0% probability may reflect a mismatch between the offered range and the statistical median rather than a genuine expectation of a cold day.

Traders should monitor the Beijing Meteorological Bureau’s 72-hour forecast for heatwave advisories and real-time precipitation data, as sudden rain events can suppress peak temperatures significantly. No specific government announcements are scheduled for this date, but the dependency on local weather patterns means the catalyst is purely atmospheric. A conditional order strategy would involve entering positions only when the forecasted high exceeds the upper bound of the market’s range by at least 2°C, ensuring the trade aligns with the historical volatility observed in mid-July [1].

Sources: 1

Methodology

We track Highest temperature in Beijing on July 20? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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.

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.