Highest temperature in Chengdu on July 13?

Platform comparison

Market context

Chengdu Shuangliu International Airport is expected to record its peak daily temperature on 13 July 2026, with historical July climatology typically centering on 30–32°C and early-July observations frequently reaching 34–36°C under similar conditions[1][2]. While the current crowd-implied probability for a specific outcome sits at 0% YES, Polymarket data shows the frontrunner outcome is 38°C at 34%, followed by 37°C at 28%, indicating significant divergence in how traders interpret the heat risk compared to the zero-probability stance on this platform[1]. This contrasts sharply with US-regulated books like Kalshi, which would likely express these odds as decimal prices rather than implied probabilities and enforce strict KYC, whereas Polymarket offers a more accessible, non-KYC alternative with a different fee structure that often attracts higher volatility on weather events.

Traders should monitor real-time updates from Wunderground, the designated resolution source, as China recently experienced its hottest July on record since 1961, raising the baseline for extreme heat events in the region[5]. The settlement window closes at 12:00:00Z on 13 July, meaning afternoon highs—which can occasionally reach 38°C in fuggy July conditions—will be the decisive factor[2]. Unlike Betfair or Smarkets, which might list this as a binary or multi-outcome market with different liquidity dynamics, Polymarket’s multi-outcome format allows granular positioning on exact temperature ranges, a feature that diverges from the simpler binary structures common on European exchanges. The 20 rainy days typical in July could suppress temperatures, but the recent record heat suggests a higher probability of the 37–38°C range than the current 0% implied probability suggests.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Chengdu on July 13? 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 Kalshi Alternative UK, 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.

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 supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK 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.