Highest temperature in Singapore on July 1?

Platform comparison

Market context

On 1 July 2026, the Singapore Changi Airport Station will record its peak daily temperature in degrees Celsius, with the market resolving to the specific range containing that figure. The settlement window closes at 12:00 UTC on 1 July 2026, and the resolution source is Wunderground’s official daily history for that station. While one platform currently shows a 99% implied probability for 32°C, the market in question assigns 0% to the “YES” outcome, highlighting a stark divergence in how different books price identical weather events.

Historical climate data from 1991 to 2020 places Singapore’s July average high at 31°C (89°F), with daytime temperatures rarely exceeding 34°C (93°F) [2]. The Southwest Monsoon Season typically unfolds in July, bringing windier conditions but not unusually heavy rainfall, and sunlight lasts roughly 12 hours daily [2]. Recent global trends show July 2024 was the warmest on record worldwide, yet Singapore’s local extremes remain bounded, with a 40-year peak of 37°C recorded recently [3][8]. This context suggests the 0% probability may reflect an overreaction to outlier data rather than a genuine climatic shift.

Traders should monitor the National Environment Agency’s daily weather bulletins and Wunderground’s real-time updates as the settlement date approaches, particularly for any anomalies in the 1 pm rainfall peak, which often coincides with temperature dips [2]. The monsoon intensity and humidity levels—ranging from 64% to 93%—are key dependencies that could suppress peak temperatures below 32°C [2]. Platforms like Polymarket, which use decimal odds, may price this differently from Kalshi or Betfair, which rely on implied probabilities and stricter KYC, creating arbitrage opportunities where fee structures and liquidity diverge significantly.

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 Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

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.

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.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.