Highest temperature in Seoul on July 13?

Platform comparison

Market context

Seoul is facing a mid-July heatwave as traders assess the likelihood of record-breaking highs at Incheon International Airport on 13 July 2026. The crowd-implied probability sits at 0% YES, suggesting the market believes the temperature will not exceed the settlement threshold, yet recent patterns indicate a potential underdog value in betting on extreme heat.

Historical data frames this as a contrarian opportunity rather than a safe favourite. July in Seoul typically sees highs between 29°C and 31°C, rarely exceeding 33°C, but the city recently shattered a 117-year record with a 37.8°C spike in early July 2025 [1][6]. Furthermore, Seoul experienced 22 consecutive “tropical nights” in July 2025, with overnight temperatures staying above 25°C, signalling a sustained shift toward hotter summer conditions [2][3]. If this trend continues, the 0% pricing may ignore the elevated baseline for extreme heat.

Traders should monitor the Korea Meteorological Administration’s daily heat advisories and real-time readings from Wunderground, the official resolution source [4]. A recent Anadolu Ajansı report confirmed Seoul hit 37.7°C in early July 2025, the highest for that period since 1908, reinforcing the risk of another outlier [6]. With settlement ending at 12:00 UTC on 13 July, any pre-noon heat spike could invalidate the current consensus, making this a high-conviction spot for those betting against the 0% implied probability.

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 Who Will Win 2026, which mirrors the Polymarket order book directly.

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

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 Who Will Win 2026. 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.

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.

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.