Pronóstico: Highest temperature in Seoul on June 29?

Platform comparison

Market context

The underlying real-world event is whether Incheon International Airport will record a peak temperature on 29 June 2026 that falls into the specific range triggering a "YES" outcome, with the market currently pricing this at a 16% probability. On Polymarket, this contract trades on the Polygon blockchain using USDC, where conditional tokens reflect the crowd’s belief that such an extreme spike is unlikely given the season’s typical thermal behaviour.

Historical data frames this low probability against Seoul’s June climate, which usually sees daytime highs between 19°C and 28°C, with the month’s absolute peak reaching only 34.0°C on 19 June 2026[6]. While AccuWeather forecasts daily highs of 85°F to 91°F (roughly 29°C to 33°C) for June 2026[2], the 16% price suggests traders doubt a record-breaking surge will occur on this specific date, as June remains early summer before the intense mid-summer heat and monsoon rains dominate late June to mid-July[1].

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for any sudden humidity spikes or heatwave announcements, as these are the primary catalysts for temperature deviations[3]. Recent reports confirm South Korea experienced its hottest spring and May ever, driven by elevated sea surface temperatures, which could predispose the region to earlier heat extremes[10]. However, with the monsoon season typically starting late June, the immediate weather dependency remains on whether the rain arrives early enough to suppress temperatures below the critical threshold.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Pronóstico: Highest temperature in Seoul on June 29? 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 Polymarket Argentina, 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.

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 Polymarket Argentina 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.