Highest temperature in Shanghai on June 1?

Platform comparison

Active sub-markets

Market context

Shanghai's highest temperature on 1 June 2026 will be recorded at Pudong International Airport Station and resolved via Wunderground historical data. Early June sits within Shanghai's late spring period, typically characterised by warming trends ahead of the summer monsoon season. The 0% crowd probability suggests either extreme confidence in a specific temperature range or minimal trading activity on this particular market variant.

Historical June temperatures at Shanghai Pudong show a median high around 28–30°C, with occasional peaks exceeding 32°C during early heat waves. The settlement mechanism—using Wunderground's daily maximum rather than official meteorological bureau records—introduces a data-source dependency that differs from how some competing platforms (Kalshi, for instance) structure weather markets using NOAA or national weather services. This choice affects reproducibility; traders comparing across Polymarket, Betfair, and Smarkets should verify whether alternative books reference identical stations and measurement protocols, as airport readings can diverge from city-centre observations by 1–2°C.

Catalysts affecting the outcome include the East Asian summer monsoon's onset timing and any anomalous high-pressure systems developing over eastern China in late May. The China Meteorological Administration typically issues seasonal outlooks in April; traders should monitor whether June 2026 is forecast as warmer or cooler than the 30-year normal. Fee structures across platforms—Polymarket's 2% settlement fee versus Betfair's variable commission—will influence whether the 0% probability reflects genuine market consensus or simply insufficient liquidity to move odds away from extreme positions.

Methodology

We read Highest temperature in Shanghai on June 1? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Polymarket Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative UK, 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 Alternative UK 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Alternative UK 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.