Highest temperature in Beijing on June 30?

Platform comparison

Market context

Beijing is currently bracing for blistering heat as June heatwaves return to the capital, with temperatures soaring past 41 degrees Celsius in recent years. This market tracks the highest temperature recorded at the Beijing Capital International Airport Station on 30 June 2026, resolving to a specific degree range. The current crowd-implied probability of 0% for a "YES" outcome suggests traders are betting against an extreme high, yet historical data frames this as a volatile period where record-breaking days are not uncommon.

Historical records show Beijing hit 41.1°C on 22 June 2023, marking the hottest June day in over 60 years and smashing the city's previous record[1][2]. Average June highs typically reach 30°C, with roughly ten days exceeding 35°C, rarely falling below 73°F or exceeding 96°F[3][4]. A power-user approaching this programmatically would note that while the 0% probability implies safety, the 2023 anomaly demonstrates that a single day can shatter norms, making the 0% line a potential trap if the heatwave intensifies.

Traders must monitor the National Meteorological Centre's daily heatwave forecasts and any official announcements regarding air quality or emergency cooling schedules, as these dependencies often precede temperature spikes. Reuters reported that the 2023 heatwave returned after scorching northern China, pushing the city to 41.1°C[1]. For a bot-driven strategy, one should script alerts for Wunderground's hourly updates at the ZBAA station, watching for sustained rises above 38°C, which historically correlate with the 41°C outliers seen in recent years[8]. The settlement window ending 12:00 UTC on 30 June 2026 requires precise timing to capture the peak before the cutoff.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Beijing on June 30? 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Bot 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 Bot 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.