Highest temperature in Seoul on July 5?

Platform comparison

Market context

On 5 July 2026, the Incheon International Airport Station will record its peak temperature, a metric that determines the outcome of a prediction market where the crowd currently assigns zero probability to a “YES” resolution. This stark 0% implied probability suggests traders believe the event is impossible, yet historical data reveals Seoul’s July climate is notoriously volatile, with average highs hovering near 28°C and frequent spikes exceeding 30°C due to intense humidity and monsoon dynamics[1][2].

Comparable cases frame this probability as dangerously low; Seoul recently scorched at 37.8°C in early July, marking the highest temperature ever recorded in the capital for that period and beating a 117-year record[9][10]. Such extremes demonstrate that early July is not a safe window for assuming cool weather, as the city sits right in the middle of the Jangma monsoon season, where short but heavy rainfalls can clear to leave steamy, heat-trapping conditions that push temperatures well above the 20°C average[1].

Traders must monitor the Korea Meteorological Administration’s short-range forecasts for sudden shifts in cloud cover and precipitation probability, as these directly influence peak heat accumulation[4]. Recent reports from the Straitstimes highlight that record heat and torrential rains are predicted for Korea this summer, indicating a high-risk environment where temperature anomalies are more likely than stable conditions[9]. The Sinchon Water Gun Festival in late July also signals a season of active water events, though the immediate catalyst for 5 July remains the interplay between monsoon clearance and rising solar intensity[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 Best Prediction Markets 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 Best Prediction Markets 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.

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.