Highest temperature in Shanghai on July 23?

Platform comparison

Market context

Shanghai’s temperature on 23 July will be measured at Pudong International Airport, and the market is really about whether the day’s peak falls in the mid-30s Celsius range rather than below it. The current book is concentrated around 35°C and 36°C, with 36°C the narrow frontrunner at 40% and 35°C close behind at 35%, while the crowd-implied probability of 0% YES points to an extremely detached price signal rather than a literal forecast of no heat.[1]

Seasonally, that framing is consistent with Shanghai’s July climate, when average daily highs are about 31°C and humidity is high, making afternoons often feel hotter than the raw thermometer reading suggests.[2] On that basis, the market’s centre of gravity sits above the long-run norm, but not by enough to imply a clear break-out heat event; in practical terms, a result in the low-to-mid 30s is the base case, with a top-end push into 36°C still plausible if sunshine dominates and marine influence is weak.[2]

For traders, the main catalyst is not a political calendar but the day’s weather evolution: cloud cover, rainfall timing, and whether daytime heating survives into the early afternoon before the airport station logs its maximum. With settlement tied to the highest reading recorded on Wunderground for Shanghai Pudong International Airport, attention should stay on short-range forecasts and local observations rather than citywide averages, because a brief shower or sea-breeze change can cap the high by a degree or two.[1][2]

Sources: 1 · 2

Methodology

This page tracks Highest temperature in Shanghai on July 23? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.