Highest temperature in Shanghai on August 6?

Platform comparison

Market context

Shanghai’s airport high on 6 August is being priced as a fairly routine late-summer heat outcome rather than an extreme. AccuWeather’s Shanghai August outlook shows daily highs mostly in the high 20s to low 30s °C, while current market pricing on Polymarket clusters around the low-to-mid 30s, with 33°C and 34°C both leading at 21% and 32°C at 12%.[1][6] That leaves the crowd materially more constructive on a hot day than the broad climate average, but not on a breakout event: the implied shape is consistent with a forecast around 31–34°C rather than a much cooler or exceptional spike.[2][11]

Historical August conditions support that read. Multiple travel-weather sources describe Shanghai’s August daytime maximums around 31–32°C, with occasional hotter days and high humidity, while the airport-specific settlement source will matter because coastal and urban heat can diverge from city-centre readings.[2][8][12] The current 0% YES probability in your feed looks disconnected from both the seasonal baseline and the live market snapshot, suggesting either stale pricing, a contract-specific data issue, or a misread of the outcome bands rather than a genuine expectation of near-impossible weather.[6]

Traders should watch the official Shanghai Pudong Airport station reading on Wunderground as the decisive input, alongside any local heat advisories or typhoon-related cloud/rain shifts that can cap the afternoon maximum.[14][20] Recent warnings have already shown Shanghai can reach 35°C in early August, which keeps the upper bands live if sunshine holds through the day.[14] The main cross-platform comparison is straightforward: Polymarket is assigning meaningful weight to 33–34°C, while sportsbook-style weather lines and analyst-style seasonal consensus sit nearer 31–32°C, implying the market is leaning a little hotter than climatology but not wildly so.[2][6][11]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on August 6? 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 Best Prediction Markets, 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.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.