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 firmly within South Korea’s monsoon season where daily highs typically approach 30°C but are frequently suppressed by heavy, concentrated rainfall and humidity exceeding 80%[1][4]. Historical patterns show Seoul’s July averages sit between 21°C and 28°C, with midday heat often feeling like over 34°C due to moisture, yet the rainiest month in Korea means clear, scorching days are less common than steamy, wet intervals[1][2]. The current 0% YES probability on Polymarket reflects this climatic reality: conditional tokens priced in USDC on the Polygon network are betting that temperatures will not breach the specific threshold required for a “YES” resolution, aligning with the wet, humid baseline rather than an abstract heatwave scenario[3].

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for heatwave declarations and precipitation probabilities, as even a 10% chance of rain can drastically alter temperature outcomes during the monsoon window[6]. Recent travel guides emphasise that July short but heavy rainfalls are more concentrated than in June, making umbrella use nearly daily and reducing the likelihood of sustained high temperatures[1]. The Sinchon Water Gun Festival in late July also signals a cultural shift toward water-based cooling, though it occurs after this settlement window; the immediate catalyst is the daily weather schedule, where clear skies followed by rising moisture can create a steamy feel without necessarily hitting extreme highs[1]. Watch for real-time Wunderground updates for Incheon, as the resolution source depends entirely on the highest recorded temperature for all times on this day, and any cloud cover or rain event will likely keep readings below the critical range[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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

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 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.