Highest temperature in Singapore on July 1?

Platform comparison

Market context

The real-world event in question is the highest temperature recorded at Singapore Changi Airport on 1 July 2026, measured in degrees Celsius and sourced from Wunderground. This single data point will determine the resolution of the prediction market, with the settlement window closing at 12:00 UTC on 1 July 2026.

Historically, July in Singapore sees average high temperatures around 31°C, with typical daily highs ranging between 31°C and 33°C, and heat indices often exceeding 41°C due to high humidity [2][5]. The current crowd-implied probability of 0% for any outcome above 32°C appears inconsistent with these patterns, as 32°C is the leading outcome at 44% and carries a 99% frontrunner probability in the broader market [1]. Programmatically, a trader would script a bot to monitor Wunderground’s hourly updates for WSSS, cross-referencing with BBC Weather’s real-time observations, which currently show 28°C at 7 AM with a projected peak of 30°C [3].

Traders should watch for sudden tropical thunderstorms or haze events, which can suppress daytime peaks, as well as official climate advisories from the Singapore Meteorological Service. Recent forecasts indicate daily highs between 85°F and 90°F (approximately 29.4°C to 32.2°C) for July 2026, reinforcing the plausibility of the 32°C outcome [7]. A conditional order strategy could be deployed to auto-execute if Wunderground’s 12:00 UTC reading exceeds 32°C, leveraging the 99% market confidence in that threshold [1]. No moralising is needed; the data alone frames the utility of this tool for power-users evaluating weather-linked conditional orders.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.