Highest temperature in Guangzhou on July 23?

Platform comparison

Market context

Guangzhou has started the day under **dangerous heat**, with the latest local reading showing 91°F and a RealFeel near 109°F, so the immediate question is whether cloud cover or a shower line can cap the airport’s midday peak.[2] The market is still pricing **36°C** as the frontrunner, but the crowd’s 0% YES impression looks out of step with current conditions and the city’s typical July heat profile.[1][4]

July in Guangzhou usually delivers highs around **32°C to 34°C**, with daily temperatures rarely falling much below the mid-30s Celsius in the hottest spells.[4][6][8] That means a top reading in the 35°C to 36°C band would be entirely consistent with seasonal norms rather than an outlier, especially at an airport station where peak heat can arrive before or around early afternoon. The key context for reading the probability is that the distribution is already skewed towards very hot outcomes, not a cool day outcome.[4][7]

For traders, the main catalysts are the day’s convective weather and the timing of any rain or thicker cloud that might blunt insolation after morning heating.[2][8] AccuWeather currently shows a meaningful chance of precipitation and thunderstorms, which matters because even brief showers can interrupt the climb to the daily maximum, while a mostly dry morning leaves the higher temperature bands in play.[2] The settlement source is the Guangzhou Baiyun International Airport Station history page, so the important watchpoint is the station’s recorded maximum rather than citywide averages.[1]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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'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 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.