Highest temperature in Shenzhen on August 4?

Platform comparison

Market context

Shenzhen’s highest temperature for the day is the value to watch at Bao'an International Airport, and the market is anchored to a narrow late-summer band rather than a wide dispersion. Seasonal climatology puts Shenzhen in a hot, humid monsoon regime in August, with average daily highs around 31–32°C and heavy rainfall common, which keeps most comparable outcomes clustered in the low 30s rather than at extremes.[3][4][16][20]

That is why the current 0% YES crowd price looks more like a hard reset than a meaningful forecast signal, especially versus the platform’s own live distribution, which has concentrated around 31°C and 32°C in similar Shenzhen temperature markets.[6] On cross-platform comparison, sportsbook-style weather pricing is usually much coarser than prediction-market granularity, so the relevant gap here is between the market’s thin tail risk and the consensus expectation of a humid, showery afternoon rather than a materially cooler or hotter day.[3][6][15]

The catalysts are straightforward: hourly rain bands, cloud cover, and any overnight or morning convective bursts that can suppress or delay the day’s maximum before the settlement window closes.[3][7][15] Traders should also watch for any typhoon-related advisories or forecast revisions, since Shenzhen in August sits inside the broader South China rain season and late-day temperature outcomes can move quickly when showers arrive earlier than model runs suggested.[19][20]

Sources: 1 · 2 · 3 · 4 · 5

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 PolyGram, which mirrors the Polymarket order book directly.

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

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.