Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 31°C | 100% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
Shenzhen is currently under an orange rainstorm warning with overcast skies and heavy morning precipitation, conditions that suppress peak temperatures well below the thresholds required for a “YES” resolution. Current readings at Bao’an International Airport show 29°C (84°F) with a RealFeel of 37°C, while forecasts cap today’s high at 30°C amid 90% precipitation probability [1][4][6]. This active wet pattern explains the crowd-implied 0% probability, as sustained cloud cover and rain prevent the intense solar heating needed to breach higher temperature bands.
Historically, July is Shenzhen’s hottest month with an average high of 32°C (89°F), but days matching today’s stormy profile rarely exceed 31°C [2][9]. Comparable cases from recent July weeks with similar orange rain warnings show maximums clustering between 28–30°C, far below the 33°C+ ranges that typically trigger affirmative outcomes in this market. The current 0% pricing aligns with this thermal ceiling, reflecting the near-certainty that today’s weather will remain in the lower temperature bracket.
Traders should monitor the timing of the rainstorm’s cessation and any shift in cloud cover through the afternoon, as a rapid clearing could allow a late heat spike. The primary catalyst is the official Wunderground daily record for ZGSZ, which will lock in the highest temperature regardless of forecast adjustments [market description]. No scheduled meteorological announcements are expected before the 12:00 UTC settlement, meaning real-time observations from AccuWeather and WeatherSpark will be the decisive indicators for any late probability shifts [1][3].
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 Prediction Today, 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 Prediction Today. 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.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade Highest temperature in Shenzhen on July 21? on Prediction Today
Live order book, 0% fees, USDC settlement in seconds.
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