Highest temperature in Shanghai on May 22?

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Market context

Shanghai’s highest temperature is being measured at Pudong International Airport on 22 May, with settlement based on the day’s recorded maximum in Celsius. Late-May climatology in Shanghai is normally warm and humid rather than extreme: typical highs are around the mid-to-upper 20s Celsius, with cloud and drizzle common, but brief spikes into the low 30s are not unusual. That makes the main question less about whether it will be warm and more about which rounded temperature band the airport observation ultimately lands in.

For context, Shanghai in May usually sits in a narrow seasonal range, and recent comparable readings have often clustered around the low 20s to upper 20s Celsius rather than far outside it. WeatherSpark’s May climatology shows average daily highs rising from about 22°C to 26°C through the month, while travel-weather guides describe May as a transition period with some rainy days. Against a crowd-implied probability of 0% YES, the market looks like it is pricing a specific temperature band as essentially out of reach; in practice, that can happen when the referenced band is high enough to require an early-season heat spike, or when traders expect the wrong airport station or time window to matter.

What matters now is the late-afternoon evolution of the forecast and whether any warm, sunny surge holds through the official daily maximum at Pudong before the 12:00 UTC settlement window closes. Traders should watch local forecast updates, any change in cloud cover or rainfall timing, and whether winds turn onshore, which would cap temperatures near the coast. On access, German GlüStV rules can materially limit direct participation for many German residents, US CFTC reach can matter for US-facing users depending on venue structure, and “no-KYC up to $1,500” generally means smaller accounts may be able to trade without identity verification until cumulative limits are reached, improving access for low-stakes positions in this market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shanghai on May 22? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against 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

Is this market available outside the US?

PolyGram 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.

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.

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?

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

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.