Highest temperature in Chengdu on August 2?

Platform comparison

Market context

Chengdu’s airport temperature on 2 August will be judged on the day’s *single highest reading* from Wunderground’s Chengdu Shuangliu International Airport Station, so the market is really about whether the afternoon heat peaks into the upper-30s Celsius rather than where the daily mean ends up. August is normally one of Chengdu’s hottest, muggiest periods, with average highs around 29-31°C and occasional extremes above 35°C, so the cleanest historical comparison is a summer day with a brief hot spike rather than a prolonged heatwave.[2][3][6][18]

That backdrop makes the crowd-implied 0% YES look detached from the climatology, because forecasts for Chengdu in August commonly cluster around low-30s Celsius highs and a meaningful tail into the mid- to upper-30s on hotter days.[2][7][10][13] For a binary-style contract linked to a temperature band, the practical question is whether the airport station prints a genuinely exceptional maximum before the settlement cutoff, not whether the city stays humid or rainy overall.[3][4][14]

Traders should watch the local daytime forecast updates, cloud cover, and thunderstorm timing, because Chengdu’s summer rainfall is frequent but often brief, and clear breaks can let temperatures jump quickly before convection builds again.[2][3][5][10] With settlement in USDC on-chain, the event is mostly insulated from BTC or ETH direction, though broader crypto conditions can still affect pricing if market makers widen spreads or if funding and spot volatility shift risk appetite; the market’s edge will come from reading meteorological updates, not macro beta.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Chengdu on August 2? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.