Highest temperature in Shanghai on August 6?

Platform comparison

Market context

Shanghai’s 6 August high is a straightforward weather event at Pudong airport, but the market is currently pricing in an extremely narrow outcome: the crowd-implied probability sits at 0% for **YES**, so any upside depends on a temperature reading that lands squarely in the listed resolution band. Recent forecast pages for Shanghai point to very warm conditions in the low 30s Celsius, with AccuWeather showing about 89°F/79°F for 6 August and other climate guides placing early-August highs around 31–35°C, which is consistent with a hot but not extreme summer day. [1][2][6][10]

The historical frame matters because Shanghai in August regularly sits in the low-to-mid 30s, yet the city also sees occasional spikes well above that when heat warnings are issued. The strongest comparable case in the supplied material is Shanghai’s record heat in August 2013 and the later 2026 warning for central Shanghai that maximum temperatures could reach 35°C, which is a reminder that a single warm spell can push the daily high higher than the seasonal average. [5][12][20]

For traders, the main catalyst is not a debate schedule or a disclosure but the next updated forecast cycle and any Shanghai Meteorological Observatory warning that changes expectations for the day’s peak. The market is effectively leaning on whether the current warm-weather setup holds through local afternoon heating; if forecasts keep clustering around 33–35°C, the upper temperature brackets stay live, while any rain, cloud cover, or an earlier-than-expected sea-breeze shift would pull the high down. Polymarket’s live pricing already shows the market concentrating on the low-30s outcomes, with 33°C and 34°C leading. [8][12]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Shanghai on August 6? 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.

UK Frequently Asked Questions

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 Election Predictions UK route into the same order book at 0% fees.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.