Highest temperature in Seoul on June 12?

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Market context

Seoul's peak temperature on 12 June 2026 will be measured at Incheon International Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at midday UTC, capturing the full calendar day's high in Celsius. For automated traders, this requires parsing Wunderground's historical archive interface programmatically—the resolution source sits behind a web interface rather than a direct API, necessitating either scheduled scraping or manual verification at settlement time.

June in Seoul typically ranges between 20–28°C, though heat waves can push readings into the low 30s. The 0% crowd probability suggests either extreme confidence in a specific temperature band or insufficient liquidity across all outcome ranges. Historical June data from Incheon shows that temperatures above 30°C occur roughly once every three to four years during this month, whilst readings below 22°C are comparatively rare. Traders should cross-reference multi-year Wunderground archives for June 12th specifically to calibrate baseline expectations against seasonal norms.

The Korea Meteorological Administration publishes 10-day forecasts updated daily; checking their English-language bulletin in early June will signal whether anomalous heat or cooler patterns are developing. El Niño or La Niña conditions, tracked by NOAA, influence East Asian summer temperatures months in advance. For conditional order strategies, setting triggers tied to KMA forecast updates released 5–7 days before settlement allows dynamic position adjustment as meteorological certainty increases. Incheon's coastal location moderates extremes compared to inland Seoul, a material distinction when evaluating tail-risk temperature outcomes.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 App 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.

Is this market available outside the US?

Polymarket App UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on Polymarket App UK?

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

Do I need to KYC for this market?

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

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.