Highest temperature in Seoul on July 2?

Platform comparison

Market context

On 2 July 2026, traders are assessing the highest temperature recorded at Incheon International Airport, a critical benchmark for Seoul’s summer heat. While the current crowd-implied probability for a “YES” outcome sits at 0%, Polymarket data reveals a stark divergence: the frontrunner is 28°C at 39%, followed by 27°C at 26%, indicating strong collective confidence in extreme heat despite the zero-probability signal on the opposing contract.

Historically, July in Seoul is the wettest and most humid month, with average highs hovering between 25–30°C and occasional peaks nudging 30°C. Monsoon rains (Jangma) typically begin in late June and persist through mid-July, often delivering short but intense downpours that temporarily cool the air before humidity and rising temperatures create a steamy, oppressive feel. In 2026, the rainy season is expected to spread across southern Korea by Wednesday, yet Seoul remains forecast to stay hot and humid through the weekend, aligning with the market’s 28°C lean.

Traders should monitor real-time updates from Wunderground for the Incheon station, as well as Korea Meteorological Administration heatwave alerts and local monsoon progression reports. Recent forecasts from AccuWeather indicate July 2026 highs ranging from 81° to 91°F (27–33°C), reinforcing the plausibility of the 28°C outcome. The Sinchon Water Gun Festival in late July may also influence local humidity and temperature patterns, though its timing falls after the settlement window.

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Methodology

This page reviews Highest temperature in Seoul on July 2? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi vs Polymarket, which mirrors the Polymarket order book at 0% fees.

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 Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 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.

Do I need to KYC for this market?

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