Highest temperature in Seoul on June 2?

Platform comparison

Market context

Seoul's weather on 2 June 2026 will be measured at Incheon International Airport, the standard meteorological station for the region. Early June typically marks the transition into South Korea's rainy season, with temperatures generally ranging between 20–28°C, though heat waves occasionally push readings higher. The settlement hinges on Wunderground's historical data feed for that specific station, which requires traders to verify the temperature unit conversion settings before placing positions.

Historical June temperatures at Incheon show considerable year-to-year variation. Between 2015 and 2024, daily highs in early June ranged from 18°C during cooler years to 31°C during anomalously warm periods. The 0% crowd probability suggests either extremely tight range boundaries in the market's resolution categories or insufficient liquidity to attract hedging interest. Comparable weather markets typically see deeper order books when settlement windows approach within two weeks, as traders gain confidence in forecast models and historical analogues become more reliable.

Traders monitoring this market should track the Korea Meteorological Administration's extended forecasts, which typically gain accuracy five to ten days before the settlement date. Deposit friction remains material for weather market participation—traders requiring SEPA transfers or Klarna on-ramps may face settlement delays that compress their decision window. Book depth will likely remain shallow until late May, when near-term weather patterns crystallise and capital flows into weather-hedging positions.

Methodology

This page compares Highest temperature in Seoul on June 2? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. PolyGram additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Resolution source: This market settles from the official publication at https://www.wunderground.com/history/daily/kr/incheon/RKSI. A proposer submits the result to the UMA Optimistic Oracle on Polygon, the two-hour challenge window opens, and the smart contract pays out in USDC.

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like PolyGram add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

What does SOFORT cost as a deposit method?

PolyGram charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).

Are payment details protected?

Yes. Card and bank details are never stored by PolyGram — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). PolyGram retains only transaction IDs and Klarna reference numbers for reconciliation.