Highest temperature in Shanghai on August 4?

Platform comparison

Market context

Shanghai is set for another hot, humid late-summer day, with forecast highs for early August clustered around the low 30s Celsius and AccuWeather putting 4 August near 91°F, or about 33°C, within an August range of 82–92°F. That leaves the market’s resolution band anchored well above mild-weather outcomes, which is why the crowd’s 0% YES read looks consistent with a summer-heat baseline rather than a temperature shock.[1][7]

For framing, Shanghai’s August climatology is routinely warm enough to produce maxima in the upper 20s to low 30s Celsius, and several forecast services point to a high around 32–34°C on 4 August itself.[5][8][13] The key comparable case is not an extreme heatwave but a standard Shanghai summer day: if the airport station reaches the low-to-mid 30s, the result should sit in the central bands; only a materially cooler, rain-suppressed afternoon would push the reading lower.[2][3][12]

The main catalyst is the *intraday temperature profile* at Shanghai Pudong International Airport, since the market resolves to the highest temperature recorded there on 4 August, not city-wide conditions. Traders should therefore watch the day’s forecast updates, any thunderstorm or rain timing, and whether the airport stays on the warmer side of nearby station readings; AccuWeather and other forecast services currently lean towards a hot afternoon, with only limited rainfall risk in the local forecast set.[1][3][18]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Shanghai on August 4? 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 Trump Prediction 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

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

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 Trump Prediction 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.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.