Highest temperature in Shanghai on June 20?

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Market context

Polymarket is pricing the Shanghai Pudong International Airport temperature contract at **0% YES** today, so the market is effectively saying there is no chance the station’s highest reading on 20 June 2026 lands in the YES band. Because settlement uses Wunderground’s daily high at Shanghai Pudong International Airport Station, the trader’s task is to watch the airport-specific temperature print rather than broader Shanghai weather headlines, and the token mechanics still matter: positions are held in USDC on Polygon through conditional tokens, so the price reflects the market’s collective view of the settlement outcome rather than a direct weather forecast.

That 0% level is consistent with how these contracts often behave when the day is already underway and the observed high is thought to be locked in. For context, June at Shanghai Pudong is typically a hot month, with average daily highs around the low 30s Celsius and occasional days reaching the mid-30s, so a terminal price at zero implies the crowd believes the realised airport high has already fallen outside the relevant range or is overwhelmingly likely to do so.[3][7] Comparable airport-weather markets usually tighten sharply once local midday conditions are known, because the remaining upside is limited by the day’s actual maximum and not by forecasted evening temperatures.

For traders, the main catalysts are the official airport observations feeding through to Wunderground, especially any late-afternoon spike before the settlement window closes, alongside short-term rainfall, cloud cover and wind changes that can cap the daily maximum. Recent regional forecasts for Shanghai show light rain, humidity in the mid-80s and modest winds, which are the kind of conditions that can suppress extremes at the airport even when the broader seasonal baseline is warm.[2][5] The practical watchpoint is whether the station’s recorded high is updated before the market resolves, since the on-chain payout depends on the final temperature bin rather than the forecast path.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On Polymarket Legit?, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Legit? is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on Polymarket Legit??

Zero. Polymarket Legit? routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Legit? triggers a quick verification flow that finishes in minutes.