Highest temperature in Seoul on July 6?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Incheon International Airport on 6 July 2026, which will determine the market resolution. Long-term averages for Seoul in July suggest daytime maximums around 28°C, with high heat and humidity typical of the season [1][2]. Historical data indicates a July maximum of 27.7°C, yet recent anomalies have shattered expectations; Seoul reached 37.7°C in early July 2026, the highest early-July temperature in 117 years of records [3][7]. This extreme deviation frames the current 0% crowd-implied probability as potentially mispricing the risk of a similar heatwave, given that 2026 has already demonstrated record-breaking thermal volatility [8].

Traders must monitor the Korea Meteorological Administration’s short-range forecasts and any sudden shifts in monsoon patterns, which could trigger rapid temperature spikes [5]. The settlement relies on Wunderground data from Incheon, so any discrepancies between airport and city readings require careful scrutiny. Recent reports confirm Seoul scorched at 37.8°C in early July, marking the highest early-July temperature ever recorded [9]. Conditional tokens on the Polygon network, settled in USDC, will reflect these on-chain mechanics as the market prices in the probability of such extremes. Watch for official announcements regarding heat advisories, as these often precede the peak temperatures that drive resolution outcomes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on July 6? 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 PolyGram, 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 PolyGram. 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.

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