Highest temperature in Shanghai on July 13?

Platform comparison

Market context

Shanghai’s highest temperature on 13 July 2026 will be recorded at the Pudong International Airport station, with settlement based on Wunderground’s daily high in degrees Celsius. The current 0% YES probability implies the market expects the temperature to fall outside the defined range, likely below the threshold that would trigger a YES outcome.

Historically, July in Shanghai Pudong regularly sees highs exceeding 30°C, often reaching 35°C during sunny spells, with the month’s hottest day typically around 28 July averaging 88°F (31.1°C) [1][5]. All-time records for Shanghai have hit 105°F (40.6°C) on 26 July, confirming that extreme heat is possible in mid-summer [10]. Given these patterns, a 0% probability suggests the contract’s range is set unusually high or the market anticipates a cooler-than-average day, which would be an outlier for this period.

Traders should monitor real-time forecasts from Yr and meteoblue, which currently project a maximum of 33°C for 13 July at Pudong, with 9.4 mm of precipitation and 5 m/s winds [3][9]. Any sudden shift in cloud cover, rainfall, or wind speed could alter the peak temperature. While no direct crypto catalysts tie to this weather event, USDC settlement mechanics mean price volatility in BTC or ETH could influence liquidity and whale flows into weather contracts on btc-prediction.bet, especially if macro funding rates tighten ahead of the 2026-07-13 settlement deadline.

Sources: 1 · 2 · 3 · 4 · 5

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.

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.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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.