Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win 2026) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | See live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | See live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | See live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | See live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | See live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 37°C | 100% |
| 30°C or below | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 38°C | 0% |
| 39°C | 0% |
| 40°C or higher | 0% |
Market context
Guangzhou’s peak temperature on 10 August is a **favourite to land in the mid-to-high 30s Celsius**, but the market’s current **0% YES** implies traders are effectively pricing the specific outcome as unavailable rather than merely unlikely. That leaves the consensus anchored around the broader heat regime, with outside chances concentrated in the **36–38°C** band that several forecasts currently point towards. AccuWeather has Guangzhou’s day high at **100°F/36°C**, Weather.com.cn shows **36°C**, and Weather Underground’s station page was already printing a very warm morning read with a forecast for the day ahead[4][7][8].
Historically, Guangzhou in August is one of the city’s hottest periods, with typical daytime highs around the low-to-mid 30s and humidity staying elevated, so a top temperature in the upper 30s is not out of character[11][13][17][19]. That makes the favourite any outcome tied to a reading in the forecast range, while the underdog is a cooler ceiling if cloud cover or showers cap the afternoon. The contrarian angle is that Weather Underground’s resolution source is the **Daily Observations** table, not the day-high summary, so any market that is priced off the headline forecast alone can be vulnerable if the observed maximum diverges from the earlier projection[5].
For traders, the key catalysts are the afternoon heating profile, cloud cover, and whether convective rain interrupts the run-up to peak temperatures. Current guidance is for hot conditions with limited rain and strong sunshine, but small shifts in storm timing can move the observed maximum by a degree or more, which matters directly for a range-based contract[3][4][6]. The practical watchpoint is the first published post-peak observation in Weather Underground’s station feed, because once the daily maximum is locked there, late forecast changes elsewhere stop being relevant to settlement[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 Who Will Win 2026, which mirrors the Polymarket order book directly.
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
- 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 Who Will Win 2026. 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.
- 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.
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