Highest temperature in Seoul on July 6?

Platform comparison

Market context

On 6 July 2026, the Incheon International Airport Station will record Seoul’s official daily maximum temperature, which determines the outcome of a prediction market where traders currently assign zero probability to a 28°C peak. This resolution hinges on a single degree band amidst nine competing temperature ranges, meaning the market’s 0% YES stance reflects extreme scepticism that the high will land precisely at 28°C rather than anywhere else in the 21°C to 31°C spectrum.

Historical climatology for early July places Seoul’s mean daily high firmly between 28°C and 30°C, with significant variance driven by the East Asian monsoon system[1]. Recent records show Seoul hitting 37.7°C in early July, the highest in 117 years, while the nation also endured its second-hottest July since 1973 with an average of 27.1°C[5][6]. Platforms like Polymarket and Kalshi diverge here: Polymarket offers decimal odds reflecting this 40% modal probability for 28°C, whereas Kalshi often frames outcomes as implied probabilities with stricter KYC requirements and different fee structures, altering how traders interpret the same climatic data[1].

Traders must monitor the Korea Meteorological Administration’s forecast updates between now and noon Seoul time, as the market remains highly sensitive to any shift in monsoon intensity[1]. The East Asian monsoon schedule is the primary catalyst, with recent news highlighting a century-old record of 22 consecutive tropical nights where temperatures stayed above 25°C, suggesting persistent heat that could push highs beyond the 28°C band[7][8]. Bets on Kalshi may require full identity verification, while Polymarket allows more anonymous participation, creating divergent liquidity pools for the same weather dependency.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Seoul on July 6? 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

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

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.

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 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.

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.