Highest temperature in Beijing on June 30?

Platform comparison

Market context

Beijing is currently experiencing blistering heat as June heatwaves return to the capital, with temperatures soaring past 41°C and smashing the city’s June record for the second time in history[1][4]. This real-world event of extreme thermal stress frames the current market context, where the crowd-implied probability for a YES outcome sits at 0%, suggesting traders believe the specific temperature range on 30 June 2026 will not be hit despite the prevailing heat.

Historical data indicates that June in Beijing typically sees daily highs rising from 84°F to 87°F, rarely exceeding 96°F, yet the city has recorded about ten days with highs of 35°C or above this month[2][3]. The divergence between the 0% prediction-market probability and the analyst consensus on such a hot month is stark, as sportsbook lines on similar weather contracts often reflect a higher likelihood of extreme temperatures, whereas this market appears to have priced out the risk entirely despite the 41.1°C record set in 2023[1][5].

Traders should monitor the daily weather schedules from Wunderground for the Beijing Capital International Airport Station, as the resolution depends on the highest temperature recorded for all times on this specific day[7]. Recent reports confirm that heatwaves are searing parts of northern China, making the timing of the peak temperature critical for settlement[5]. Any sudden shifts in cloud cover or precipitation forecasts could alter the daily high, though the current trend points to sustained high temperatures that may challenge the market’s zero-probability stance[9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Beijing on June 30? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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 Best Prediction Markets. 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 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.

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