Highest temperature in Chengdu on July 20?

Platform comparison

Market context

Chengdu’s highest temperature on 20 July 2026 is being priced as a certainty at 38°C, with the market assigning a 100% probability to that outcome while the “YES” side for any alternative range sits at 0% [1]. This reflects a near-total consensus among traders that the day’s peak heat will hit that specific threshold at Chengdu Shuangliu International Airport Station, the designated resolution point for the event.

Historically, Chengdu experiences intense summer heat in July, with daily highs frequently reaching 35–39°C during peak months, making 38°C a plausible and historically consistent figure for mid-July extremes. Comparable years show similar patterns, where temperatures cluster tightly around this range, reinforcing the crowd’s confidence in the 38°C outcome and explaining the 0% implied probability for lower or higher brackets.

Traders should monitor real-time weather updates from Wunderground, the official resolution source, as well as any sudden shifts in regional cloud cover or monsoon activity that could alter the peak temperature. While no specific announcements are pending, the dependency on a single data feed means any discrepancy between Wunderground and local meteorological reports could introduce settlement risk. On platforms like Polymarket, this market appears as decimal odds (1.00 for 38°C), whereas Kalshi and Betfair typically use implied probability or fractional odds, and fee structures vary significantly—Polymarket charges no trading fees but may impose withdrawal costs, while Smarkets and Betfair apply commission on winnings, affecting net returns on such high-certainty bets.

Sources: 1

Methodology

This page compares Highest temperature in Chengdu on July 20? 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.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

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.