Highest temperature in Shanghai on August 9?

Platform comparison

Market context

Shanghai’s temperature on 9 August will be decided by the day’s actual observations at Pudong, not by the headline high shown in summary panels, which makes the market sensitive to the warmest hourly burst rather than the broader daily feel. Current weather models point to a wet, windy day, with AccuWeather showing a forecast high of 85°F and a 97% chance of precipitation, while Time and Date has 84°F/78°F and flash floods in the outlook; that sits well below the kind of midsummer spike that would push the market into higher temperature bands.[2][3]

That leaves the present 0% yes price understandable: Shanghai’s August climate is hot on average, but the specific forecast for Sunday leans cooler and rain-affected, with broad summer norms around 87°F average highs and August highs often ranging into the low 90s Fahrenheit.[1] For context, comparable late-summer Shanghai setups usually resolve around the forecasted band unless a brief pre-rain heating surge or delayed cloud cover nudges the station reading upwards, so traders should weight the actual hourly observations more than the daily “feels like” figures.[14][15]

The main catalyst now is the evolution of the storm track and the timing of the heaviest rain, because that will determine whether the daytime maximum arrives early or gets capped before it can rise. AccuWeather’s hourly and next-day pages show showers becoming heavy, strong NE winds and full cloud cover, which is the clearest near-term dependency for any upward move in the temperature range.[2][5] Because the market resolves from Weather Underground’s daily observations, the key watchpoint is whether Pudong records a brief mid-morning or early-afternoon peak before convection suppresses the temperature later in the day.[15]

Sources: 1 · 2 · 3 · 4 · 5

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 August 9? 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.

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.

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 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.