Highest temperature in Shanghai on August 1?

Platform comparison

Market context

Shanghai’s airport temperature on 1 August is the real-world trigger, and the current **0% YES** implies the market is pricing almost no chance of the day’s maximum landing in the specified higher range. That makes the **favourite** the lower-temperature buckets by a wide margin, with the only serious **underdog** angle being an unexpectedly strong heat spike in the afternoon. For a handicapper, the consensus is clear: Shanghai in August is hot, but not uniformly extreme, so the market’s zero bid on YES looks like a view that the day’s peak will stay below the relevant threshold rather than a claim of cool weather overall. August highs in Shanghai typically sit around **32–33°C**, with average daily highs near **32°C** and common ranges in the upper 20s to mid-30s Celsius, which frames any very high bucket as a tail event rather than a base case.[1][2][8][17]

The historical read is that Shanghai can produce isolated heat extremes, but the distribution is still skewed towards ordinary summer heat rather than record-setting spikes. Published climate summaries show August as Shanghai’s hottest month, with average highs around **32°C**, while records can reach **40–41°C** in exceptional heatwaves.[4][5][6] Recent city reporting also notes August heat records and long runs of days above **35°C**, showing that the upside tail is real when a heat dome establishes itself.[3] That leaves the value question concentrated in whether the day’s maximum comes from a broad, humid but manageable summer pattern or from one of the rarer hot-air outbreaks that can push the airport well above normal August levels.

The main catalysts are nowcast details rather than long-range averages: cloud cover, rainfall timing, monsoon positioning, and whether a typhoon fringe or sea-breeze suppresses the afternoon peak. Shanghai August forecasts from mainstream weather services already point to daily highs around the low 30s Celsius, with some sources showing **82–92°F** daily highs for the month, which supports the idea that most of the distribution sits below extreme thresholds unless the day turns sharply hotter after sunrise.[9][10][14] Traders should watch airport-specific updates through the day, because the settlement source is Shanghai Pudong International Airport Station on Wunderground, and the final print depends on the highest observed temperature before the market window closes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shanghai on August 1? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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.

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