Highest temperature in Singapore on July 1?

Platform comparison

Market context

On 1 July 2026, the Singapore Changi Airport Station will record its highest daily temperature in degrees Celsius, a metric that determines the outcome of a prediction market where the crowd currently assigns zero probability to any “yes” result. This event hinges on the Southwest Monsoon Season, which typically brings windy but sunnier conditions to Singapore in July, with average highs around 31°C and daytime peaks rarely exceeding 34°C. The settlement window closes at 12:00 UTC on 1 July 2026, and resolution data will be sourced from Wunderground’s historical daily records for the station.

Historical climate data from 1991–2020 shows July average highs in Singapore at 31°C, with daytime temperatures seldom surpassing 34°C, while extreme records—such as the 37°C peak noted in a 40-year high—remain outliers rather than norms[1][8]. Given this consistency, the current 0% implied probability likely reflects a market consensus that no temperature range above a certain threshold will be reached, though platforms diverge on interpretation: Polymarket uses decimal odds while Kalshi and Betfair emphasise implied probabilities, and fee structures and KYC requirements vary significantly across these books, affecting trader access and cost efficiency on this specific market.

Traders should monitor real-time Wunderground updates and any sudden shifts in monsoon intensity or cloud cover, as these are the primary catalysts for temperature deviation. Recent global heat records, including July 2024 being the warmest July on record globally, suggest broader warming trends may influence local conditions, though Singapore’s tropical climate remains relatively stable[2]. No official announcements are expected, but continuous weather monitoring via Wunderground’s station data is essential, as dependencies include humidity levels (averaging 64–93%) and wind patterns that modulate peak temperatures[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Singapore on July 1? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

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. Robinhood Prediction Markets 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.