Highest temperature in Beijing on July 23?

Platform comparison

Market context

Polymarket currently has this contract centred on **28°C**, which is trading at 78%, with **29°C** the next closest outcome at 19%[1]. For a user buying conditional tokens with USDC on Polygon, that pricing says the market is leaning towards a warm but not extreme Beijing afternoon at the Capital International Airport station, rather than a sharp heat spike above 30°C[1].

That framing fits Beijing’s July climate: the city sits in a temperate monsoon zone with concentrated summer precipitation, and July typically brings highs around 33°C alongside heavy rainfall risk[2][3]. In practical market terms, that means the downside case is often a rain-cooled or cloud-covered day, while the upside tail depends on sustained sun and weak storm interference; a close-to-forecast high around 28–29°C is therefore the base case implied by the order book[1][2].

The main catalysts to watch are the local forecast revisions and any thunderstorm or rainfall timing over the airport area, because the market resolves on the **highest temperature recorded at Beijing Capital International Airport Station** on the day, not the citywide average[1]. Traders should follow intraday Beijing aviation-area weather updates and the Wunderground history page used for settlement, since a late-morning or early-afternoon warming burst can still shift the final print even if the broader day looks unsettled[1][2].

Sources: 1 · 2 · 3

Methodology

This page reviews Highest temperature in Beijing on July 23? 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 PolyGram, 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 PolyGram. 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.

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.

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.