Highest temperature in Seoul on July 24?

Platform comparison

Market context

Seoul’s late-July heat is usually governed by a humid monsoon pattern rather than a dry summer spike, so the day’s *maximum* can hinge on cloud cover, showers and the timing of any breaks in the rain. July in Seoul commonly sees average highs around 27–30°C, but heavy rainfall and the late June-to-mid July rainy season can still spill into late July, making a 0% crowd price on a high-temperature market harder to justify than a simple seasonal average would suggest.[1][3][4][5]

For comparison, prediction books do not frame this contract in the same way. Kalshi-style markets usually show an implied probability directly, while Polymarket and some offshore books quote decimal prices or percentages that traders convert back into odds; that matters here because a “0% YES” screen can reflect a formatting floor, thin liquidity, or a genuinely extreme view rather than a literal no-chance outcome. Betfair and Smarkets also differ on fees and access: exchange commission changes the effective price, and KYC/geo-restrictions can narrow who can participate, which can keep weather contracts in low-turnover territory even when the underlying forecast is unsettled.

The main catalysts are the near-term Seoul forecast, the positioning of rain bands, and whether the airport station sees enough sunshine and wind slackening to lift the afternoon high before the settlement cut-off. Traders usually watch official and station-level forecasts, but for this market the final print is Wunderground’s Incheon Intl Airport Station history page, so the relevant move is the actual recorded maximum on 24 July rather than a citywide headline temperature. Because the window ends at 12:00 UTC, intraday warmth before that point is what matters most, and any later-day heat would be irrelevant to settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Seoul on July 24? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative UK offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.