Pronóstico: Highest temperature in Seoul on July 2?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Incheon International Airport on 2 July 2026, a date falling squarely within South Korea’s hot, humid monsoon season where daily highs typically reach 25–30°C and can feel like over 34°C due to humidity above 80%[1][2]. Historically, July is the rainiest month in Korea, with intense, concentrated downpours that often clear quickly, yet the lingering moisture combined with rising temperatures creates a steamy, oppressive feel that can still push temperatures into the upper 20s or low 30s even after rain[1][2]. The current 0% YES probability on Polymarket suggests the crowd believes the temperature will not exceed the defined threshold, likely because recent July 1 data saw the 30°C bracket sit at 69.5% probability, indicating traders are already pricing in a high likelihood of hitting that mark, making the 0% figure for a different threshold potentially a mispricing or a reflection of a very high bar[4].

Traders should monitor the Korea Meteorological Administration’s short-range heatwave forecasts and the timing of the Jangma monsoon, which is expected to spread across southern Korea from Tuesday night through Wednesday, potentially affecting Seoul’s humidity and temperature patterns by the weekend[3][7]. A key catalyst is the Sinchon Water Gun Festival in late July, which, while not on 2 July, signals the broader summer heat and humidity trends that define Seoul’s climate, alongside the need to track hourly 60–90 minute rain windows that could temporarily lower temperatures but leave the air feeling warmer due to moisture[1][2]. Recent forecasts from AccuWeather indicate July 2026 daily highs in Seoul will range from 81° to 91°F (27–33°C), with an average high of 85°F (29°C), reinforcing that temperatures consistently hover near or above 30°C, making the 0% probability for a higher threshold a critical point of on-chain arbitrage for USDC holders on Polygon using conditional tokens[8][10].

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 Argentina. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

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.