Highest temperature in Singapore on July 8?

Platform comparison

Market context

The real-world event centres on the highest temperature recorded at Singapore Changi Airport on 8 July 2026, measured in degrees Celsius and sourced from Wunderground. Current crowd-implied probability sits at 0% for a YES outcome, suggesting the market expects the temperature to fall outside the specific range being traded, likely below 31°C given typical July patterns.

Historically, Singapore’s July highs at Changi rarely breach 32°C due to consistent maritime influence and frequent thundery showers that cap peak temperatures. BBC Weather notes today’s high at 31°C with thundery showers and a gentle breeze, aligning with long-term averages where temperatures typically vary between 25°C and 30°C [2]. Even during extreme heat events, maritime cooling limits records, as seen in comparable tropical cities where heat domes failed to push temperatures beyond 37°C [6].

Traders should monitor real-time meteorological updates for sudden shifts in cloud cover or wind patterns that could trigger a heat spike. The National Weather Service provides live METAR data for Changi, which is critical for programmatically assessing temperature trajectories [3]. Recent forecasts from AccuWeather indicate morning rain and brief showers, reinforcing the likelihood of capped highs [1]. No major climate announcements are scheduled, but dependencies include regional monsoon activity and urban heat index trends, which bots can track via Wunderground’s historical API for conditional order execution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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 Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.