Highest temperature in Beijing on July 23?

Platform comparison

Market context

Beijing Capital International Airport’s peak temperature on 23 July is the live weather print that will settle this market, and the crowd is currently leaning to a **28°C** outcome with **34%** implied probability. The next rung is **27°C** at **30%**, which makes the **28–31°C** band the consensus zone rather than a single clean favourite[1].

For a handicapper, that means the market is pricing a fairly compressed summer range, with the favourite only modestly ahead of the pack and the underdog outcomes still close enough to matter. The current **0% YES** framing looks like a mismatch with the venue’s own distribution: if the settlement is keyed to the day’s highest reading, the value discussion is less about an outlier heat spike and more about whether cloud, convection or an early storm trims the afternoon ceiling into the high-20s. In that sort of setup, contrarian interest usually sits on the edges of the band rather than on a runaway hot-day thesis[1].

The main catalysts are the same ones that move terminal-airport temperature markets everywhere: the timing of showers or thunderstorms, the depth of cloud cover through the warmest part of the day, and any shift in the synoptic setup that changes whether the airport briefly clears and warms. Traders will also watch the Wunderground history page closely, because the market resolves on the highest recorded reading for the station on the day, with revisions counted only until the first datapoint for the following date is published[1].

Sources: 1

Methodology

We track Highest temperature in Beijing on July 23? 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.