Highest temperature in Seoul on July 8?

Platform comparison

Market context

Seoul is currently experiencing extreme heat, with temperatures reaching 37.8°C on 8 July, marking the highest early-July reading ever recorded in the South Korean capital since records began[1]. This real-world benchmark frames the current 0% YES probability on the prediction market for the highest temperature in Seoul on 8 July 2026, suggesting the market views a repeat of such a record-breaking day as statistically improbable despite the current heatwave.

Historically, July in South Korea is the wettest month, dominated by the monsoon season (Jangma) which typically lasts from late June to mid-July, often bringing short but heavy rainfalls that suppress peak temperatures[2]. While daily average highs in July usually close to 30°C, the combination of high humidity and frequent rainfall means temperatures rarely sustain the extreme 37.8°C level seen today, providing a comparable case for traders to read the current low probability as grounded in seasonal climatology rather than market error[2][3].

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for precipitation probability and temperature feels, as a 60% chance of rain with slight intensity could quickly lower the day’s peak temperature[6]. The upcoming Sinchon Water Gun Festival in late July, while not on 8 July, signals the broader cultural and meteorological shift towards cooling activities during the monsoon peak, reinforcing the dependency on rainfall to break the heat[2]. USDC settlements on Polygon via conditional tokens will resolve based on Wunderground data, making real-time weather updates the primary catalyst for any potential price movement before the 2026 settlement window closes.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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 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.

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.