Highest temperature in Tokyo on July 13?

Platform comparison

Market context

Tokyo faces its peak summer heat on 13 July 2026, with the Tokyo Haneda Airport Station expected to record daily highs between 25°C and 33°C, based on current forecasts showing July highs ranging from 76°F to 91°F [1]. The crowd-implied 0% probability for any specific high-temperature range suggests traders view the outcome as effectively certain within a narrow band, or that the market lacks sufficient liquidity to price uncertainty. Historical data confirms Japan’s mid-July temperatures routinely breach 36°C in urban centres, with humidity exceeding 95% creating jungle-like conditions that trap heat in concrete [6].

Recent climate trends frame this event: Japan recorded its hottest July since 1898 in 2025, with average temperatures up 2.89°C above the 1991–2020 baseline [5]. The nation also set a new all-time record of 41.2°C in Tamba City on 30 July 2025, breaking the previous 41.1°C mark from 2018 [7][3]. Traders should monitor the Japan Meteorological Agency’s daily heatwave bulletins and any sudden shifts in the Pacific high-pressure system, which typically drives sustained high temperatures through mid-July.

Platform mechanics diverge sharply here: Polymarket displays implied probability (0% YES), while Kalshi, Betfair, and Smarkets use decimal odds, requiring conversion for cross-book comparison. Fee structures vary—Polymarket charges no platform fees but includes network gas costs, whereas Betfair imposes a commission on winnings and Smarkets offers lower fees for high-volume traders. KYC requirements also differ: Polymarket allows non-custodial crypto access without identity verification, while Kalshi mandates full US KYC, and Betfair/Smarkets require identity checks for fiat users. These structural differences affect liquidity depth and price efficiency on this weather event.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Tokyo on July 13? 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 Polymarket 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

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.

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.

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.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

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