Highest temperature in Chengdu on August 2?

Platform comparison

Market context

Chengdu’s airport temperature on 2 August is usually a straightforward summer heat event rather than an extreme outlier, with August averages clustering around the low 30s Celsius and humidity often high enough to keep conditions muggy. Historical guides put Chengdu’s August average highs near 29.8°C to 31°C, while day-specific tables for 2 August commonly show highs around 31.5°C, which makes a result in the low-30s bands more plausible than a breakout into very hot ranges.[1][2][3]

That framing helps explain why a 0% crowd-implied probability can still be a pricing artefact rather than a literal read on the weather. On markets like Polymarket, the crowd typically trades in direct implied probability, while Kalshi, Betfair and Smarkets express the same view through decimal prices or back/lay odds, so the same temperature band can look “cheaper” or “more expensive” depending on fee treatment and book format. Chengdu’s August record heat is materially higher than the mean, with sources citing historic maxima around 39°C to 41.6°C, so traders usually focus on whether the day’s peak sits near the mid-30s or climbs into heatwave territory.[3][6][7]

The main catalyst is the day’s evolving airport observation, not a policy event or schedule announcement. For a settlement source tied to Wunderground’s Chengdu Shuangliu International Airport Station, traders will watch the intraday high as the afternoon warms and any late spike before the settlement window closes; nearby station data and city-wide forecasts can matter, but only the recorded airport maximum resolves the market. Platform access also differs: Polymarket and Kalshi use account-based access with KYC, while Betfair and Smarkets may be more familiar to sports traders but are less directly comparable on a binary weather contract because their costs, liquidity and market structure are not the same.[5][8][9]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Chengdu on August 2? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.