Highest temperature in Shanghai on June 29?

Platform comparison

Market context

The real-world event determining this market is the highest temperature recorded at Shanghai Pudong International Airport on 29 June 2026, measured in degrees Celsius. Historical data for this location shows daily highs in June typically rise from 77°F to 83°F, rarely dipping below 69°F or exceeding 92°F [1]. Summer conditions regularly push temperatures above 30°C, reaching 35°C during the most intense sunny spells [5]. The current crowd-implied probability of 0% for any specific range suggests traders are either misinterpreting the temperature scale or betting on an extreme anomaly, as standard June climatology firmly places highs within the 24°C to 32°C bracket [7].

Traders should monitor immediate weather schedules, particularly the forecast for light rain and a gentle breeze expected on 29 June, which could suppress peak temperatures to around 29°C [2]. A risk of thunderstorms at 25% further indicates potential cooling from cloud cover and precipitation [6]. When comparing platforms like Polymarket against Kalshi or Betfair, divergence appears in how implied probability is presented versus decimal odds, alongside distinct fee structures and KYC requirements that may alter liquidity for this specific weather event. Understanding these platform mechanics is essential for accurately pricing the 0% signal against the robust historical evidence of warm summer days in Shanghai.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Shanghai on June 29? 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.

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.

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.