Lowest temperature in Shanghai on July 19?

Platform comparison

Market context

Shanghai's summer temperatures in mid-July typically range between 28°C and 35°C, with overnight lows rarely dropping below 24°C during the city's peak monsoon season. The lowest temperature recorded on any given day in July represents the coolest point in a 24-hour cycle, usually occurring in the early morning hours before dawn. Historical data from Shanghai Pudong International Airport shows that July minimums have occasionally dipped to 22–23°C during particularly wet or cloudy periods, though such occurrences are uncommon.

The 0% implied probability across prediction markets suggests traders are pricing in an expectation that the lowest temperature on 19 July 2026 will fall within the warmest range offered by the market's resolution brackets. This divergence from typical July behaviour warrants scrutiny: if the market's upper threshold sits at or above 24°C, the current odds reflect confidence that overnight conditions will remain unusually warm. Conversely, if lower brackets exist below 22°C, the crowd assessment implies negligible risk of a cool night, which would align with long-range seasonal forecasting showing above-average temperatures across East Asia through summer 2026.

Traders should monitor the China Meteorological Administration's monthly outlooks and any significant atmospheric patterns—such as tropical cyclone activity or unusual pressure systems—that could drive cooler air into the Yangtze River Delta region during mid-July. Real-time weather models become reliable only 10–14 days before the settlement date, making early positioning speculative against seasonal norms rather than actionable forecast data.

Methodology

We track Lowest temperature in Shanghai on July 19? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.