Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Bot UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 35°C | 100% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Guangzhou’s high on 5 August is a simple station-level temperature call: the market resolves to the day’s maximum at Guangzhou Baiyun International Airport Station, so the key variable is whether the airport records a peak inside one of the posted Celsius bands by the settlement cut-off. Forecasts for Guangzhou on 5 August 2026 sit firmly in the low 30s Celsius, with one source showing around 32°C and another pointing to daily highs near 33°C, which places the live probability around the middle of the typical August range rather than at an extreme. [2][9][15]
The 0% crowd price is best read against Guangzhou’s historical August profile, where daily highs are commonly around 33°C to 34°C and can reach the mid-30s, so a hot outcome is climatologically normal even if the exact station reading is uncertain. For a programmatic workflow, the useful input is not city weather headlines but the intraday maximum from the specified Wunderground station page, with updates pulled until the settlement window closes; this kind of market is sensitive to the station’s own hourly evolution, not just the broader Guangzhou forecast. [1][6][8][14][15]
The main catalysts are the midday-to-afternoon temperature path, cloud cover, rainfall, and whether convection limits heating or allows a late-day peak. Current live conditions in Guangzhou are already hot, with AccuWeather showing temperatures in the mid-90s Fahrenheit and a high heat index, while other forecasts on the same day point to heavy rain at times, which could cap the maximum if showers arrive early enough; the practical watchlist is the station forecast, radar, and any short-range adjustments rather than broader seasonal commentary. [2][11][12]
Methodology
This page reviews Highest temperature in Guangzhou on August 5? 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
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.
- 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.
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