Highest temperature in Shanghai on July 28?

Platform comparison

Market context

Shanghai experiences significant seasonal temperature variation, with July typically among the hottest months. Historical data from Shanghai Pudong International Airport shows July daily highs frequently exceed 32°C, with occasional peaks above 35°C during heat waves. The 0% implied probability suggests traders expect the settlement range to fall below the lowest option available, which warrants scrutiny against climatological norms for this location and date.

July 2026 temperature outcomes depend on broader atmospheric patterns established weeks prior. The East Asian summer monsoon intensity, tropical cyclone activity in the Western Pacific, and potential Tibetan high-pressure system positioning all influence Shanghai's weather during late July. Recent meteorological forecasting from sources like the China Meteorological Administration typically shows reliable 10–14 day outlooks by early July, though seasonal forecasts issued now carry substantial uncertainty. Any significant heat wave affecting eastern China in the preceding weeks would shift expectations upward.

Traders should monitor tropical cyclone formation and tracking from June onwards, as systems approaching or crossing eastern China can suppress temperatures substantially. Conversely, a dominant high-pressure system over the region typically drives sustained heat. Real-time weather pattern development in late June and early July will provide clearer signals than current seasonal models. The settlement window closes at midday on 28 July, capturing the full diurnal cycle for that date at Pudong Airport.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Shanghai on July 28? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

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.

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.