Highest temperature in Singapore on July 27?

Platform comparison

Market context

Singapore’s afternoon high is being priced by Polymarket traders at the **31°C** band, with **30°C** close behind, while the contract sits at **0% YES** in the current crowd view. On Polymarket, shares are settled in **USDC** on **Polygon** through conditional tokens, so the price is simply the market’s live estimate of which temperature bucket will match the Singapore Changi Airport Station reading recorded on Wunderground.

That spread is narrow enough to show how traders usually read Singapore weather markets: the city-state sits in a fairly tight tropical temperature range, so a one-degree shift can move the leading bucket without implying a major change in conditions. The present 0% YES reading is consistent with how these contracts behave when the exact outcome is not yet resolved, because only one temperature range will ultimately redeem at $1 and the others expire worthless.

What matters now is the daytime evolution at Changi rather than the abstract forecast. Traders usually watch the local morning build-up, cloud cover, rainfall timing, and any official short-range guidance that could shift the peak away from the low 30s. With resolution tied specifically to the highest reading at Wunderground’s Singapore Changi Airport Station page, the practical catalyst is whether the rest of the afternoon produces a brief warm spike or stays capped by showers and cloud.

Sources: 1

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 Alternative 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Alternative 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.