Highest temperature in Busan on August 1?

Platform comparison

Market context

The key event is the **highest temperature recorded at Gimhae International Airport in Busan on 1 August 2026**, with the market settling on the range containing that day’s peak reading. Because the source is a single station and the cutoff is fixed at 12:00 UTC, programmatic monitoring should target the Wunderground daily history page and poll for the day’s updated maximum once observations begin to accumulate, rather than relying on city-wide forecasts alone.

Busan’s August climate is normally hot, humid and stable enough that the upper-end forecast range often matters more than the daily mean. Long-run climate pages put August highs around **29–30°C** and show that Busan can reach the low-to-mid 30s on particularly warm days, with historical record highs well above that level[3][4][15]. AccuWeather’s August 2026 outlook places daily highs in the **82–88°F** range, which is roughly **28–31°C**, so a zero-implied market price is materially below the seasonal expectation and would need an unusually cool outcome to resolve YES[1][16].

For a power-user workflow, the main catalysts are the presence or absence of sunshine, sea-breeze moderation, and any rain-band timing that suppresses afternoon heating; these are the variables most likely to shift the day’s maximum before the settlement window closes. Busan’s summer is also the wettest part of the year, with high humidity and frequent precipitation, so a live weather bot or conditional order keyed to intraday forecast updates can be useful if the morning trend points away from a warm afternoon. Comparable late-summer heat events in South Korea have pushed airport stations into the mid-30s Celsius, so traders watching the tape should treat any persistent warm bias in the hourly forecast as the relevant trigger rather than the city average[14][18][19].

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 Polymarket Bot UK. 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'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.

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