Highest temperature in Busan on August 18?

Platform comparison

Market context

Busan's highest temperature on 18 August 2026 will be recorded at Gimhae International Airport Station and measured against specific threshold bands in Celsius. The market settles using Weather Underground's Daily Observations table rather than summary figures, a technical distinction that matters when station data shows variance between reporting methods. Current crowd pricing at 0% suggests either extreme confidence in a specific temperature range or insufficient liquidity across the available brackets.

August in Busan typically peaks between 28–32°C, with occasional excursions above 33°C during heat waves. Historical August data from Gimhae shows the airport station—positioned near coastal influences—registers temperatures 1–2°C cooler than central Busan readings. The 2023 Korean heat wave pushed Busan to 34.2°C on 8 August; the 2018 summer saw sustained highs above 33°C for extended periods. These precedents establish the plausible range, though 2026 forecasting remains speculative at this distance.

Traders should monitor tropical cyclone activity in the Western Pacific during early-to-mid August 2026, as storm systems can suppress temperatures significantly. The Korean Meteorological Administration typically issues seasonal outlooks in June, providing directional guidance on summer heat patterns. Platform divergence appears minimal here—Polymarket, Kalshi, Betfair and Smarkets all reference identical underlying data from Weather Underground—though order-book depth and decimal-odds precision vary by venue. Kalshi's regulatory structure in the US may affect market availability for certain user bases, whilst Betfair's commission structure (5% standard) differs from Polymarket's fee model on this category.

Methodology

This page compares Highest temperature in Busan on August 18? 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, 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

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative 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.