Highest temperature in Busan on August 6?

Platform comparison

Market context

Busan’s hottest reading on 6 August will be set by the peak temperature at Gimhae International Airport, and the market is currently pricing **0% YES**, which leaves the favourite firmly on the low side of the range. In practice, the consensus sits around a modest summer high rather than a spike: Busan’s August climatology is about 30°C/86°F, while current August-2026 forecasts cluster near **33–31°C** for the city, with Busan specifically expected around **33°C** on the day and a broader monthly high band of **82–88°F**. That makes the underdog the higher temperature bands if traders are expecting a late-day surge, but the market’s zero price implies the crowd is treating a materially hotter outcome as near-impossible.[1][12][16]

Comparable cases suggest Busan can overperform in extreme heat, but those are tail events rather than the base case. South Korea has recently seen severe heat, including Busan’s **38.8°C** record during a late-July heatwave, and another report noted a new city record of **38.8°C** after more than a century of observations.[4][14] Against that backdrop, a market at 0% YES looks like a strong contrarian angle only if there is evidence of a fresh heatwave, clear offshore flow, or a synoptic setup that materially exceeds the current forecast envelope; absent that, the favourite remains the ordinary summer-high band, with value more likely in the market’s implicit assumption that the top end stays capped near the low 30s.[3][4]

The main catalysts are meteorological rather than calendar-driven: overnight and morning updates to the short-range Busan forecast, any change in heat advisories, and whether cloud cover or rain suppresses the daytime maximum. Korea’s weather service and major forecast providers will matter most in the final hours before the settlement window, because the resolution source is the single-day high recorded at Gimhae Airport rather than a citywide average. Recent reporting on the wider heat pattern in South Korea also matters because it shows the regional background remains hot, but traders should still watch whether Busan is specifically included in the more severe inland heat corridor or is left on the cooler coastal fringe.[12][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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.

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.

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.