Highest temperature in Singapore on July 1?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Singapore Changi Airport on 1 July 2026, measured in degrees Celsius and sourced from Wunderground. While the current crowd-implied probability for a specific outcome sits at 0% on one platform, Polymarket heavily favours 32°C (44.5%) or 31°C (31.5%), reflecting climatological norms and the ongoing Southwest Monsoon [1]. Historical data shows daily high temperatures in Singapore during July average around 88°F (31.1°C), rarely falling below 85°F or exceeding 91°F (32.8°C) [4]. The global context is increasingly volatile; July 2024 was the warmest July on record globally, and recent analysis confirms July broke the record for the hottest month in at least 120,000 years [2][3]. Singapore itself posted a 40-year high of 37.0°C recently, indicating that while 32°C is the statistical frontrunner, extreme outliers remain possible [9].

Traders should monitor the Southwest Monsoon schedule and any local heatwave announcements, as these dependencies directly influence peak temperatures. The divergence between platforms is stark: Polymarket uses implied probability to show a 99% chance for 32°C, whereas decimal-odds books like Kalshi or Betfair would express this as a price near 1.01, creating distinct fee structures and KYC reach differences for the user [1]. Unlike platforms requiring strict identity verification, Polymarket’s lower barrier allows broader retail participation, which can skew liquidity compared to regulated alternatives. The settlement window ends 1 July 2026 at 12:00 UTC, so real-time Wunderground updates are the primary catalyst [1]. Given the record-breaking global heat trends, the market’s heavy favouritism of 32°C may underprice the risk of a sudden spike above 33°C, a scenario currently priced at just 1% [1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Singapore on July 1? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Kalshi Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Kalshi Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.