Highest temperature in Seoul on June 23?

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Market context

The real-world event driving this market is the highest temperature recorded on 23 June 2026 at Incheon International Airport, which serves as the proxy for Seoul’s peak heat. Although the market title references Seoul, the resolution source is strictly the Incheon station data from Wunderground, a critical detail for programmatically evaluating the outcome. Traders building bots or conditional orders must parse the station code RKSI and convert the Fahrenheit readings (83°–89°) to Celsius (28.3°–31.7°) to align with the settlement ranges.

Historical patterns for late June in South Korea show temperatures rising as the month progresses, with early June averaging 25–27°C and late June often reaching 29°C or higher amid increasing humidity and monsoon onset [2][3]. The current 0% probability for the highest range contradicts this trend, as AccuWeather forecasts daily highs of 83°–89°F (28.3°–31.7°C) for June 2026, suggesting 31°C or above is plausible [5]. The frontrunner outcome of 29°C at 40% aligns with typical late-June peaks, but the monsoon dependency introduces volatility that could push temperatures lower or higher [4].

Key catalysts include the onset of the monsoon season, which typically spans June to July and can cause rapid temperature fluctuations due to heavy rain and cloud cover [4]. Traders should monitor the Korea Meteorological Administration’s short-range forecasts for daily maximums, as sudden downpours could suppress peak temperatures below 29°C [6]. A recent Facebook forecast notes early summer highs around 29°C, but the monsoon’s unpredictability means 31°C remains a viable outlier if rain delays [7]. Programmatically, scripts must ingest real-time Wunderground data for RKSI and adjust for humidity-induced heat index variations to capture the true peak.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Review UK, 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?

On Polymarket Review UK, which mirrors the Polymarket order book at 0% fees. 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 it cost to trade on Polymarket Review UK?

Zero. Polymarket Review UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Review UK triggers a quick verification flow that finishes in minutes.