Highest temperature in Seoul on July 1?

Platform comparison

Market context

The real-world event driving this market is the peak daily temperature recorded at Incheon International Airport on 1 July 2026, a date that sits squarely within South Korea’s monsoon season. Historical data confirms that Seoul’s July highs typically range between 27°C and 30°C, with humidity often pushing the felt temperature above 34°C. The current crowd-implied probability of 0% for any outcome above 30°C appears inconsistent with these norms, as the market frontrunner actually assigns a 58% chance to exactly 30°C, suggesting traders are betting on a standard hot day rather than an extreme outlier[1].

Programmatic traders should monitor short-range forecasts from the Korea Meteorological Administration, which update hourly and define the daytime high as the peak between 9 AM and the time of measurement[5]. Key catalysts include the progression of the Jangma rain front, which typically lingers until mid-July and can suppress temperatures if heavy precipitation occurs, though short, intense showers are more common in July than in June[4]. Recent social sentiment indicates early heatwaves, with temperatures hitting 32°C in early June, a pattern usually reserved for July, hinting that the atmosphere may be primed for higher readings[6]. Traders evaluating conditional orders must weigh the 72.5% implied probability for overnight lows of 21–22°C against the daytime high expectations, as stable night temperatures often correlate with clear, hot days[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on July 1? 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 Review UK, 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

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 Polymarket Review UK. 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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Review UK 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.