Highest temperature in Singapore on July 8?

Platform comparison

Market context

On 8 July 2026, the Singapore Changi Airport Station will record its highest temperature for the day, with the market resolving to the Celsius range containing that peak. Current crowd-implied probability sits at 0% for the temperature hitting 31°C, suggesting traders believe conditions will fall outside this specific threshold despite typical July highs clustering near 31–32°C.

Historical data frames this probability sharply: July highs at Changi consistently average around 88°F (31.1°C), rarely dipping below 84°F (28.9°C) or exceeding 91°F (32.8°C) [6]. AccuWeather’s July 2026 forecast for Changi shows daily highs ranging from 85°F to 89°F (29.4°C–31.7°C), with overnight lows between 77°F and 80°F [3]. BBC Weather’s current observation for 8 July notes a high of 31°C with thundery showers, yet the 0% implied probability implies a divergence where traders expect either a cooler day or a spike beyond 31°C, possibly due to the showers suppressing the peak or intensifying solar rebound [1]. Lines.com identifies 31°C as the most likely single outcome, creating a meaningful split between analyst consensus and the prediction market’s zero probability [4].

Traders should monitor real-time updates on thundery showers and wind patterns, as these directly suppress or elevate peak temperatures. The National Weather Service’s METAR data for Changi will provide hourly wind speed and pressure readings critical for forecasting the day’s maximum [2]. AccuWeather’s 10-day forecast indicates morning rain today, which could lower the high below 31°C, while a lack of cloud cover later might push it higher [7]. No major weather announcements are scheduled, but the timing of showers relative to midday solar intensity remains the key dependency for the final resolution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Singapore on July 8? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.