Highest temperature in Chengdu on July 27?

Platform comparison

Market context

Chengdu’s airport reading on 27 July will be driven by the city’s peak summer heat, with July daytime highs typically in the **29–37°C** range and frequent heavy rain. That puts the relevant outcome squarely in a hot-weather band rather than an outlier cool spell, so the market’s current **0% YES** crowd-implied price looks detached from the normal seasonal distribution rather than anchored to a specific forecast model.[1]

For historical framing, Chengdu’s July climate profile is consistently warm and humid, with average highs around **30°C** and substantial rainfall through the month. In comparable years, the main question is usually whether convective rain or cloud cover caps the maximum temperature a little below the upper 30s, not whether the day falls into a genuinely cold range.[1][2]

Traders should watch the day-of forecast for heat build-up, afternoon thunderstorm timing, and whether any short-lived clearing allows the airport station to reach the low-to-mid 30s before convection develops. The catalyst the market is leaning on is the usual late-July temperature range at Chengdu Shuangliu International Airport, not a scheduled political event; with the contract resolving to Wunderground’s recorded daily high, the final print will depend more on station-level weather conditions than on broader city averages.[1][2]

Sources: 1 · 2

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 Chengdu on July 27? 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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.