Highest temperature in Chengdu on July 20?

Platform comparison

Market context

Chengdu’s peak heat on 20 July 2026 will be measured at the Shuangliu International Airport Station, with the market resolving to the Celsius range containing that day’s highest temperature. The settlement relies on Wunderground’s daily history for station ZUUU, settling in USDC on-chain once the 12:00 UTC window closes.

Historical July peaks in Chengdu routinely exceed 35°C, often reaching 37–39°C during heatwaves, making a 0% YES probability for any lower range implausible unless an extreme cold anomaly occurs. The prior day’s market on 19 July also resolved to No, suggesting the crowd correctly priced that date’s heat; similar consistency is expected for 20 July, where summer maxima in the Sichuan Basin typically stay well above 30°C.

Traders should monitor the China Meteorological Administration’s daily forecast for Sichuan, which often flags heatwave warnings 24–48 hours ahead, and watch for any sudden shifts in monsoon patterns that could suppress temperatures. Recent regional reports note persistent high-pressure systems over the basin through mid-July, reinforcing the likelihood of sustained high heat [1]. While crypto macro factors like BTC funding rates or whale flows do not directly influence weather, USDC liquidity on btc-prediction.bet may affect bid depth as settlement nears.

Sources: 1

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

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.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

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.