Highest temperature in Guangzhou on July 23?

Platform comparison

Market context

Guangzhou’s highest official temperature for the day will be the reading recorded at Guangzhou Baiyun International Airport Station by the end of the settlement window, so the practical task is to track the station’s maximum rather than citywide conditions. At 8:02 UTC, the local setup is already warm and humid, with Guangzhou reported at 91°F and a RealFeel of 109°F, which is consistent with a summer pattern where afternoon peaks often build after a hot morning. [1][4]

For framing the current 0% Yes probability, the key reference point is that July in Guangzhou is typically hot and muggy, with an average high around 32°C and average humidity near 82%, so outcomes in the mid-30s Celsius are normal rather than exceptional. That makes the market’s existing pricing informative for range selection: the Polymarket board currently places 36°C as the frontrunner at 69%, with 37°C at 19%, while this market is separately resolved from the airport station’s observed maximum on Wunderground. [2][4]

A programmatic trader would watch the live airport station feed, compare updates against the market’s discrete temperature buckets, and set conditional orders around the likely afternoon peak rather than reacting to the morning reading. The main catalysts are the daily heating cycle, any rain or cloud cover that suppresses the maximum, and the possibility of late-day convection; today’s historical weather tools already show mixed conditions such as light rain and fog in Guangzhou, which can matter if they persist into the warmest hours. [3][4]

Sources: 1 · 2 · 3 · 4

Methodology

This page reviews Highest temperature in Guangzhou 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 Polymarket Bot UK, 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

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 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.