Singapore 31°C High on June 20: Market at Near-Certainty

A prediction market on Singapore’s daily high temperature has reached near-certainty territory. The 31°C outcome is priced at 96 cents on the dollar, implying a 95.5% probability. That kind of pricing doesn’t reflect a close call. The market has effectively concluded this question is answered before the day ends.

The market question asks: what is the highest temperature recorded in Singapore on June 20, 2026? The 31°C outcome trades at $0.96 YES and $0.05 NO. The market resolves at 12:00 UTC+8 on June 20, 2026, with $53,465 in total volume and $107,340 in liquidity.

Here’s what the measurements are telling us. Singapore sits just one degree north of the equator. June falls in the inter-monsoon transition, a period when daytime heating peaks and afternoon convection regularly pushes temperatures into the low-to-mid 30s. The Meteorological Service Singapore (MSS) records show the mean daily maximum in June sits around 31 to 32°C, with lower values in wet, overcast conditions. A high of exactly 31°C is the floor of the normal daytime range, not an outlier.

How the Thirty-One Degree Contract Works

This market resolves YES if the highest temperature recorded in Singapore on June 20 reaches 31°C. The Meteorological Service Singapore, which operates the Changi Climate Station and the island-wide monitoring network, provides the official measurement. The market resolves at noon Singapore time on June 20.

• YES at $0.96 implies a 95.5% probability that Singapore’s daily high on June 20 reaches 31°C.
• NO at $0.05 implies a 4.5% probability that the daily high stays below 31°C or reaches a different bracket entirely.

The NO outcome pays when Singapore fails to reach 31°C on June 20. That requires overcast skies, persistent rainfall, or strong wind shear suppressing afternoon heating through the full day. Singapore’s wet season cloud cover can cap temperatures in the upper 20s, but sustained suppression below 31°C for an entire day is uncommon outside heavy monsoon episodes. June is not a peak monsoon month, which is why the NO side is priced at near-zero.

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Momentum and Market Signals

The momentum composite here is stark. The 24-hour price change hit plus 50%, moving the contract from the low-to-mid range to near-certainty in a single session. The trend score sits at 64.08. That kind of movement in a same-day weather market points to a clear driver: actual weather conditions on the ground in Singapore on June 20 confirming warm, partly cloudy conditions consistent with a 31°C peak.

Total volume is $53,465, with $41,787 of that traded in the last 24 hours. Liquidity stands at $107,340. Volume is below $1 million, which means price can move sharply on even modest new trades. The current 96-cent price reflects near-consensus, but thin books can see rapid repricing if late observational data shifts the read.

• The 24-hour price surge of 50% reflects real-time weather data confirming daytime heating in Singapore on June 20, not speculative positioning.
• The 1-hour price change is flat at 0.0%, indicating the market has stabilized after the rapid repricing event.
• Liquidity at $107,340 exceeds total volume, suggesting market makers are holding positions without heavy withdrawal.
• The trend score of 64.08 places this market in confirmed-directional territory, not neutral drift.
• Volume below $1 million means a single large trade could still move the price, even at this late stage.

Lines Analysis: What the Thirty-One Degree Threshold Tells Traders

The data doesn’t care about the politics, and in this case the data is unambiguous. Singapore’s climate record in June strongly favors daily highs at or above 31°C. The MSS long-term record shows that temperatures below 31°C for the full day require unusual suppression events: prolonged heavy rain, deep cloud cover, or persistent convective outflow. None of those conditions dominate early June in the inter-monsoon window. The 96-cent price reflects that baseline physics.

The barrier for NO is specific. Singapore’s daily maximum would need to stay at 30°C or below, or spike into a different bracket like 32°C or higher, for the 31°C contract to miss. A warmer-than-normal afternoon pushing past 32°C is actually the more interesting risk for this specific bracket. If afternoon convection fires early and temperatures spike to 33°C or 34°C, the 31°C contract resolves NO despite a hot day. That’s the subtle risk the 4.5% NO price is partially pricing in.

• MSS Changi Station data releasing before noon on June 20 will be the definitive resolution input.
• Any late-morning temperature reading above 32°C would shift the bracket risk toward a different outcome.
• Persistent cloud cover or rain extending through late morning would put downward pressure on the daily high.
• The 32°C and 33°C alternative contracts are the nearest competitors worth monitoring for bracket drift.
• MSS satellite and surface station data updates in near-real time and would reprice this market instantly on resolution.

Total volume of $53,465 favors the YES side heavily by trader sentiment (95.5% YES). The data supports that lean. The only scenario that flips this contract is a temperature overshoot into a higher bracket, not a cold snap.

LINES VERDICT

NEAR-CERTAINTY YES

Singapore’s June climate baseline and the real-time temperature data driving today’s 50% price surge both point to a 31°C daily high. The market is pricing observed conditions, not speculation.

What the market says: At 95.5% implied probability, the market has already treated this question as resolved. Thin volume below $1 million means a late bracket overshoot into 32°C or higher could still reprice quickly before the noon cutoff.

Key unknown: Whether Singapore’s afternoon temperatures on June 20 stay in the 31°C bracket or push into 32°C or above. A higher reading resolves the 31°C contract NO despite a hot day.