Highest temperature in Shanghai on August 15?

Platform comparison

Market context

Shanghai's highest temperature on 15 August 2026 will be measured at Pudong International Airport Station and resolved against the Daily Observations table on Weather Underground, with settlement occurring at 12:00 UTC that day. The market currently prices this outcome at 0% YES across all temperature bands, reflecting the standard initial state of unresolved weather contracts on Polygon-based conditional tokens before meaningful price discovery occurs. Traders holding YES positions would receive USDC payouts only if the recorded high falls within their selected range; NO holders benefit from temperatures falling outside it.

August represents Shanghai's peak summer season, with historical daily highs typically ranging between 32–35°C. The city's subtropical monsoon climate produces consistent heat during mid-August, though occasional tropical storms can suppress temperatures. Weather Underground's Daily Observations data from Pudong station has historically shown variation of 1–2°C between its primary table and summary figures, making the specified resolution source material for contract outcomes. Traders should note that the 0% probability reflects the contract's nascent state rather than any forecast consensus about the actual temperature.

The primary catalyst for price movement will be meteorological forecasts released in the week preceding 15 August 2026. Tropical cyclone activity tracking across the Western Pacific—monitored by the China Meteorological Administration and reported through Reuters and Bloomberg—could materially shift expectations if systems approach Shanghai's region. Additionally, any significant deviation in seasonal monsoon patterns reported by regional weather services would influence trading activity as the settlement date approaches.

Methodology

This page reviews Highest temperature in Shanghai on August 15? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi UK, which mirrors the Polymarket order book at 0% fees.

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.

UK Frequently Asked Questions

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.