Highest temperature in Shanghai on June 8?

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Market context

Shanghai's highest temperature on 8 June 2026 will be recorded at Pudong International Airport Station and resolved against historical weather data. The crowd currently assigns zero probability to any outcome, suggesting either insufficient liquidity or genuine uncertainty about which temperature band will materialise on that specific date. June typically marks the transition into Shanghai's early summer, with average highs around 28–30°C, though the city regularly experiences days exceeding 32°C during this period.

Historical June records at Pudong show considerable variability. The station has recorded temperatures ranging from 22°C on cooler days to 35°C or higher during heat waves. The 0% implied probability across all ranges reflects the market's nascent state rather than any meteorological certainty. Early June weather in Shanghai is shaped by the East Asian monsoon system and subtropical high-pressure systems, both of which remain difficult to forecast with precision more than a few months ahead. Recent Junes have seen mixed conditions: 2023 brought relatively moderate temperatures in early June before heat intensified later in the month, whilst 2024 saw earlier warming.

Traders should monitor seasonal weather pattern forecasts released by China's National Meteorological Centre in the weeks preceding settlement. The current zero-probability state suggests significant value exists across multiple temperature bands once the market gains traction. Atmospheric indices tracking the strength of the subtropical high and monsoon onset timing will prove decisive. Settlement occurs at noon UTC on 8 June, capturing the full day's temperature range at the airport station.

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

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.

What does it cost to trade on Who Will Win?

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

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, Who Will Win 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.