Highest temperature in Beijing on July 23?

Platform comparison

Market context

At Beijing Capital International Airport, the market will resolve on the day’s *single highest recorded temperature* at the station, so the useful question is not the afternoon forecast alone but whether the day clears the next whole-degree band before cooling or cloud/rain arrives. In practical terms, a programme watching this market would key off live airport observations and update the probability ladder only when a new daily high is printed, because the settlement source is the Wunderground history page for that station.[1]

The current 0% Yes price looks detached from the seasonal baseline. Beijing in July is typically warm and humid, with temperatures often ranging from 23°C to 31°C, and July is also one of the wetter months, with average rainfall of around 185 mm.[2] On that framing, outcomes in the high-20s or low-30s are meteorologically ordinary, while much cooler finals usually need persistent rain, a significant cloud shield, or a late-day wind shift to cap the max early. The market’s present nearest outcomes, 28°C and 27°C, are consistent with a summer distribution that still leaves room for a mid-30s print if conditions turn hot and dry.[1]

For a trader running conditional orders or a bot, the main catalysts are the morning setup, any published aviation weather updates, and whether convective rain develops around the airport during the climb to the daily maximum. The key dependency is the airport station’s own sequence of observations: if the highest temperature is set early, later forecasts matter less; if not, intraday heating can quickly move the market from cooler bins into the 28°C-plus cluster. On a day like this, the cleanest approach is to monitor the live history feed rather than the city-wide forecast, since settlement is tied to that single station.[1][2]

Sources: 1 · 2

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Review UK, which mirrors the Polymarket order book directly.

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.

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 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.