Highest temperature in Seoul on July 11?

Platform comparison

Market context

The market tracks the peak Celsius temperature at Incheon International Airport on 11 July 2026, a date falling squarely within South Korea’s peak monsoon season. Historical data shows July is the wettest and most humid month, with average highs in the upper 20s°C, though intense sunny spells can push readings into the low 30s°C [2][5]. The current 0% YES probability implies the crowd expects the temperature to fall outside the specific range offered, likely anticipating a cooler, rain-affected day typical of the *Jangma* period, despite records showing Seoul hit 37.7°C in early July 2025 [6].

A programmatic trader should script a bot to monitor the Korea Meteorological Administration’s short-range forecasts for the 40% precipitation probability and the 25°C maximum currently flagged for today [8][9]. The primary catalyst is the timing of the monsoon break; if rain clears by midday, solar heating could rapidly elevate temperatures, whereas persistent cloud cover will suppress the peak. Traders must also watch for the specific Wunderground resolution source, ensuring the Incheon station data aligns with Seoul’s urban heat trends, as humidity levels near 80% can make the “real feel” significantly higher than the dry reading [2][3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Review UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.