Highest temperature in Beijing on July 20?

Platform comparison

Market context

Beijing’s highest temperature on 20 July 2026 will be recorded at the Beijing Capital International Airport Station, with settlement determined by Wunderground’s daily maximum in degrees Celsius. The market resolves to the specific temperature range containing that peak, settling in USDC on-chain with a deadline of 12:00 UTC on 21 July 2026.

Historical data for mid-July in Beijing shows consistent highs between 33°C and 38°C, making a 0% YES probability for any lower range implausible unless an extreme cold anomaly occurs. Comparable years, including 2023 and 2024, recorded peaks near 36°C–37°C on this date, suggesting the crowd’s current pricing may misread seasonal norms. Traders should assess whether the 0% implies a specific range is deemed impossible or reflects a broader market inefficiency in weather forecasting.

Key catalysts include the National Oceanic and Atmospheric Administration’s real-time temperature feed for ZBAA and Wunderground’s final daily update, which will lock the resolution. No major weather announcements are scheduled, but sudden shifts in monsoon activity or urban heat island effects could alter the peak. Monitor funding rates on BTC and ETH futures, as whale flows into crypto derivatives often correlate with speculative positioning on non-financial prediction markets, particularly when USDC liquidity tightens.

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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.