Highest temperature in Shanghai on August 1?

Platform comparison

Market context

Shanghai’s reading will be set by the day’s *peak* at Pudong airport, so the market is really about whether the station can produce a genuine heat-spike rather than the average August climate. Shanghai’s August highs are normally in the low 30s Celsius, with typical daily highs around 31–32°C and occasional much hotter extremes; historical guides put the August record high at roughly 40–41°C, showing that very hot outcomes are possible even if they are not the norm.[2][4][6]

That backdrop helps explain why a 0% yes price is not the same as a guaranteed miss: the distribution is wide, but the market needs the single highest reading on 1 August, not a monthly average. Recent climate summaries still place Shanghai’s August highs around 32°C, while long-run climate notes say daily highs in August are usually near 90°F and only rarely climb above the mid-30s Celsius.[1][8][10]

For traders, the key catalyst is the late-morning to afternoon temperature track at Shanghai Pudong International Airport, with any change in cloud cover, onshore flow, or thunderstorm activity able to cap the day’s maximum. The most relevant external watchpoint is the official daily weather history page used for settlement, alongside short-range forecasts from major weather services; those forecasts currently point to August highs in the low 30s Celsius, which is much closer to the historical mean than to record-heat territory.[11][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Shanghai on August 1? 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.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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 Trump Prediction route into the same order book at 0% fees.

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.