Highest temperature in Seoul on July 8?

Platform comparison

Market context

Seoul is bracing for extreme heat as early-July temperatures have already shattered century-old records, with the city hitting 37.8°C on 8 July in a historic spike that marks the highest reading for the 1–10 July period since 1908[1][5]. This real-world event frames the current market probability of 0% YES, which implies the crowd believes the temperature will not exceed the lowest resolution range, a stance that seems increasingly fragile given the trajectory of this summer’s heatwave.

Historically, early July in Seoul rarely exceeds 35°C, yet meteorologists warn that this summer could be Korea’s hottest yet, with temperatures potentially soaring beyond 40°C across the nation[2]. In 2018, Hongcheon reached 41°C while Seoul hit 39.6°C, proving that extreme heat is not just theoretical but a documented underdog scenario that has previously materialised[2][4]. The consensus currently sits heavily on the lower end, but value may lie contrarianly in the higher ranges, as the data suggests a 117-year record-breaking trend that defies average July highs of 85°F (29.4°C)[6].

Traders should monitor the latest heatwave advisories, which have already been upgraded to warnings across most of the country, and track the Incheon International Airport Station’s real-time readings via Wunderground, the official resolution source[2]. Recent reports confirm Seoul reached 37.1°C on Tuesday, the highest July temperature since national data collection began, indicating the heat is intensifying rather than stabilising[2]. With tropical nights breaking century-old records and overnight temperatures staying above 25°C for 22 consecutive hours, the dependency on sustained high heat is clear, making the 0% probability a risky underdog bet against a summer that is already defying historical norms[7][8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on July 8? 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 Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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.

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 Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.