Highest temperature in Beijing on June 4?

Platform comparison

Active sub-markets

Market context

Beijing's highest temperature on 4 June 2026 will be recorded at the Capital International Airport Station and resolved via Wunderground historical data. The settlement window closes at 12:00 UTC on that date, capturing the full calendar day's peak. This market structure differs notably across platforms: Polymarket displays implied probabilities directly, whilst Kalshi and Betfair present decimal odds requiring conversion, and Smarkets uses fractional odds with distinct fee schedules that affect effective returns on weather outcomes where margins are typically tight.

June temperatures in Beijing historically range between 25–32°C, with occasional peaks above 35°C during early summer heat waves. The 0% crowd probability reflects either sparse liquidity on this specific market or trader consensus that extreme ranges have been priced out. Comparable weather markets on alternative platforms show similar clustering around modal outcomes; Kalshi's weather contracts often attract institutional flow that can suppress tail probabilities, whilst Polymarket's retail-weighted order book sometimes leaves niche temperature bands underpriced.

Traders should monitor China Meteorological Administration forecasts released in late May, which typically provide 10-day outlooks with reasonable accuracy for Beijing. The East Asian summer monsoon onset timing—usually mid-June—will influence early-month conditions; if an anomalous heat event develops in late May, forward-looking traders may spot value in higher temperature ranges before June 4 settlement. Wunderground's historical database has proven reliable for Beijing airport data, though occasional sensor maintenance can create brief gaps that resolution sources must reconcile.

Methodology

We read Highest temperature in Beijing on June 4? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

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). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Polymarket Alternative?

Zero. Polymarket Alternative 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, Polymarket Alternative triggers a quick verification flow that finishes in minutes.