Highest temperature in Shanghai on June 27?

Platform comparison

Active sub-markets

Market context

The real-world event concerns the highest temperature recorded at Shanghai Pudong International Airport on 27 June 2026, measured in degrees Celsius and resolved via Wunderground data. Historical patterns for this location in late June show daily highs typically ranging from 27°C to 30°C (80.5°F to 86°F), with averages near 28°C (82°F) and rare excursions below 25°C (77°F) even on cloudy days [1][5][7]. Given that the current crowd-implied probability for a specific lower temperature range sits at 0% YES, traders should interpret this as a market conviction that the temperature will exceed that threshold, aligning with the robust seasonal warmth where highs rarely dip below 27°C [2][6].

Key catalysts to monitor include the onset of the plum rain season, which can suppress temperatures temporarily, and any official heatwave advisories from Chinese meteorological authorities that might signal sustained high heat. Recent forecasts for June 2026 indicate daily highs between 80°F and 86°F, suggesting a high likelihood of temperatures remaining in the upper end of the seasonal band [2]. When comparing platforms like Polymarket against Kalshi or Betfair, note that Polymarket often displays decimal odds while Kalshi emphasises implied probability, and fee structures diverge significantly with Polymarket typically offering lower maker fees but requiring KYC for larger withdrawals, whereas Betfair operates with a commission model on net winnings [8]. Traders must also consider that settlement relies strictly on the 24-hour maximum from Wunderground, meaning a single hot afternoon spike could resolve the market differently than a consistently warm day.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Shanghai on June 27? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. 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). Kalshi Alternative UK routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Where can I trade this market with the lowest fees?

On Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Kalshi Alternative UK?

Zero. Kalshi Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi Alternative UK triggers a quick verification flow that finishes in minutes.