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Highest temperature in Chengdu on August 17?

Five-platform snapshot of "Highest temperature in Chengdu on August 17?" — live Polymarket pricing, plus how Kalshi, Betfair and Manifold structure the same contract.

27°C 81% 28°C 9% 29°C 7% 30°C 1% Volume: $94K Liquidity: $138K Closes: 17 Aug 2026
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Highest temperature in Chengdu on August 17?

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Best Prediction Markets) Pick
polygram.ink (preferred broker)
 81% 19% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
 81% 19% 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.

OutcomeProbability
27°C81%
28°C9%
29°C7%
30°C1%
23°C or below0%
24°C0%
25°C0%
26°C0%
31°C0%
32°C0%
33°C or higher0%

Market context

The Highest temperature in Chengdu on August 17? prediction market currently prices this outcome at 81% YES. This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the ev…

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 Best Prediction Markets, 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

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 Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
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.
Maya TorresMaya TorresFinancial Markets WriterandPriya SharmaPriya SharmaCrypto & DeFi Analyst

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