Highest temperature in Singapore on July 8?

Platform comparison

Market context

The real-world event concerns the peak temperature recorded at Singapore Changi Airport on 8 July 2026, specifically whether it will exceed 31°C. Historical data for Singapore’s summer months shows daily highs typically cluster around 88°F (31.1°C), rarely dipping below 84°F or surpassing 92°F [5]. Current crowd-implied probability sits at 0% for the “YES” outcome, which contradicts the climatological norm that July temperatures in Singapore frequently breach 31°C during the southwest monsoon transition [8]. This divergence suggests the market may be mispricing a high-probability weather pattern, a discrepancy a programmatic trader would flag by querying Wunderground’s historical API for daily maxima and comparing them against the 31°C threshold in real time.

Traders should monitor thundery showers and maritime influence, which can suppress peak temperatures despite high humidity. Recent forecasts indicate a touch of morning rain and brief showers later, potentially capping the day’s maximum below the 31°C mark [1][2]. A heat dome, while theoretically capable of breaking records in tropical cities, is unlikely to override Singapore’s strong maritime cooling effect, as seen in Miami and Singapore where record highs reached only 100°F and 97°F respectively [7]. For a conditional-order strategy, one would set alerts on Wunderground’s live data stream for the Changi station, triggering a buy if the 12:00 UTC reading approaches 31.2°C, while hedging against the 0% crowd bias by weighting the 88°F average as the baseline expectation [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Singapore on July 8? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Fees, which mirrors the Polymarket order book at 0% fees.

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 Kalshi Fees. 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.

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.

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.