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Singapore July 9 Peak Temp: Can 30°C Hold at 37%?

Singapore July 9 Peak Temp: Can 30°C Hold at 37%?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
YES at 100% implied probability

Lean No: Singapore's July climate base rate favors highs above 30°C, and the NO side at 63.5% reflects that accurately. Market probability: 36.5%.

100% Market Probability
1h +0.0% 24h +59.2% Trend Moderate (65/100)
Volume
$68.9K
$54.6K in 24h
Liquidity
$230.9K
Deep liquidity
Time Left
7 hours
Resolves Jul 9
69K Vol. Jul 9, 2026
31°C $13K Vol.
100%
32°C $11K Vol.
0%
24°C or below $2K Vol.
0%
25°C $2K Vol.
0%
26°C $2K Vol.
0%
27°C $3K Vol.
0%

Singapore sits near the equator, where daily high temperatures cluster within a narrow band almost year-round. The market for the highest temperature on July 9 has placed 30°C at 36.5% implied probability, making it the leading single outcome in a field that spans 24°C or below all the way up to 34°C or higher. That spread tells you something important: the market is pricing genuine uncertainty across a tight meteorological range, not a clear scientific lock.

The market question asks which single temperature bracket will represent the highest reading in Singapore on July 9, resolving at 12:00 UTC on that date. The 30°C outcome is priced at $0.37 YES and $0.64 NO. Total volume stands at $4,979, all of it traded in the last 24 hours. This is a very new, very thin market.

How the Singapore Temperature Contract Works

The contract resolves to YES if Singapore’s highest temperature on July 9 falls exactly in the 30°C bracket. Every other outcome resolves NO for this specific contract. The market structure covers discrete one-degree brackets, so 29°C and 31°C are each separate contracts trading simultaneously.

  • YES ($0.37, 36.5%): Singapore’s peak temperature on July 9 lands at exactly 30°C.
  • NO ($0.64, 63.5%): Singapore’s peak temperature on July 9 lands at any other value, from 24°C or below up to 34°C or higher.

The NO side wins if Singapore runs warmer or cooler than the 30°C bracket. Singapore’s Meteorological Service records official temperature readings, and July averages for daily highs cluster between 30°C and 32°C historically. A day tipping into 31°C or 32°C territory, which is common in July, is enough for NO to pay out on this contract. The NO contract doesn’t need an unusual heat event. It just needs an ordinary Singapore July afternoon.

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Momentum and Market Signals

The momentum composite here is quiet. The one-hour price change is flat at 0.0%, and the trend score of 35.83 sits in neutral territory. The entire $4,979 in volume arrived in the past 24 hours, suggesting this market opened recently and has not yet attracted sustained directional conviction.

Total volume at $4,979 is extremely thin. Liquidity at $67,952 is deep relative to volume, meaning the order book can absorb trades without moving price dramatically right now. But with this little volume, a single informed trader with weather model access could reprice this contract in minutes. Thin liquidity amplifies the significance of any incoming trade.

  • The 36.5% implied probability for 30°C reflects its status as the modal outcome in a multi-bracket field, not a strong directional bet.
  • Price moved up 5.5% on July 7, suggesting early traders added some confidence to the 30°C bracket after the market opened.
  • The one-hour flat signal and neutral trend score indicate no new weather data has arrived to shift conviction since that early move.
  • With 63.5% on NO, the market collectively expects Singapore to land outside 30°C, most likely in the 31°C or 32°C range.
  • Open interest is $0, meaning no positions are currently locked in beyond current bets.

Lines Analysis: Singapore’s Narrow Temperature Band

Singapore’s climate is one of the most stable on Earth. The city-state sits 1.3 degrees north of the equator, and daily high temperatures in July typically fall between 30°C and 33°C. The 30°C bracket is plausible precisely because it sits at the lower end of that normal range. Days with cloud cover, afternoon rainfall, or reduced solar radiation can cap highs at exactly that level. Here’s what the measurements are telling us: 30°C is not a stretch, but it is the cooler end of July’s typical range.

The data doesn’t care about the politics of which bracket wins. Singapore’s July climate data shows that highs above 30°C are more common than highs at or below it. The 31°C and 32°C brackets collectively represent a larger probability mass in any honest climatological reading. For the 30°C contract to resolve YES, Singapore needs a day that stays slightly cooler than average, perhaps with significant cloud cover or early rainfall suppressing the afternoon peak. That happens, but it is not the base case for a Singapore July day.

  • Singapore Meteorological Service data for July: watch for any forecast update issued July 8 or early July 9, as it will directly reprice all bracket contracts.
  • Regional weather patterns: any Sumatra squall line or persistent cloud cover on July 9 morning would support the 30°C bracket.
  • Competing brackets: if the 31°C or 32°C contracts move up sharply, capital is leaving 30°C and repricing warmer.
  • Rainfall timing: afternoon thunderstorms in Singapore can cool peak readings, but only if they arrive before the daily maximum is recorded.
  • Southwest monsoon conditions: Singapore is currently in its southwest monsoon season, which tends to bring afternoon convective showers that can cap afternoon highs.

The market is pricing uncertainty, not science. With $4,979 in total volume, this contract reflects early positioning rather than deep meteorological conviction. The data slightly favors outcomes above 30°C for a standard Singapore July day, which is why NO sits at 63.5%. But the southwest monsoon season introduces enough day-to-day variability that 30°C is a live outcome, not a long shot.

LINES VERDICT

Lean No, Watch the Forecast

Singapore’s July climate tilts toward highs above 30°C, and the NO side reflects that base rate accurately. The 30°C bracket remains a live outcome if cloud cover or early rainfall suppresses the afternoon peak.

What the market says: At 36.5% implied probability, the market treats 30°C as the most likely single bracket but still expects the day to run warmer more often than not. With resolution in less than 48 hours, this contract will reprice sharply on any updated forecast or early morning temperature reading on July 9.

Key unknown: The Singapore Meteorological Service forecast for July 9 is the single data point that would most aggressively reprice this contract. Any call for persistent cloud cover or a morning squall line would push YES higher. A clear-sky forecast would push capital toward the 31°C and 32°C brackets.

Frequently Asked Questions

It means the market estimates a roughly one-in-three chance that Singapore's highest temperature on July 9 lands exactly at 30°C. Other brackets, especially 31°C and 32°C, collectively hold the remaining probability.

NO resolves YES if Singapore's peak temperature on July 9 falls in any bracket other than 30°C, including 29°C, 31°C, 32°C, or any other listed outcome. July typically runs warmer than 30°C in Singapore.

A Singapore Meteorological Service forecast update for July 9 would be the most direct catalyst. Significant cloud cover or rainfall forecasts would push the 30°C bracket higher. A clear-sky forecast would push capital toward warmer brackets.

The market resolves on July 9, 2026 at 12:00 UTC, based on the highest temperature recorded in Singapore on that date. Resolution is less than 48 hours away from the current market timestamp.

Volume this thin means prices can shift sharply on a single trade. The $67,952 liquidity depth provides some stability, but this contract should be treated as early-stage positioning, not a deeply informed consensus signal.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Cloud Cover Caps Singapore's Peak

A persistent cloud layer or morning convective system on July 9 suppresses Singapore's afternoon high, keeping the reading at exactly 30°C. The southwest monsoon season makes this a plausible but not dominant scenario. Forecast updates showing reduced solar radiation would push the 30°C contract toward 50% or higher.

Clear Skies Push Temperature Above Bracket

A clear-sky July 9 in Singapore, which is the more common pattern, sends the daily high to 31°C or 32°C. Capital migrates out of the 30°C contract and into warmer brackets. The NO side strengthens and the 30°C implied probability drops below 25%.

Rainfall Timing Creates Exact Bracket Hit

An early afternoon thunderstorm arrives before Singapore's daily maximum is recorded, cooling the peak reading and landing it precisely at 30°C. This is the mechanism by which the YES side wins. Squall line timing relative to the temperature peak is the variable that matters most.

Unusual Regional Weather System

An unexpected Sumatra squall or regional low-pressure system brings prolonged cloud cover to Singapore on July 9, suppressing temperatures below 30°C. This would push the 29°C or even 28°C bracket into play and collapse the 30°C contract entirely, repricing the full outcome distribution.

Key macro factor: Singapore is in its southwest monsoon season, which typically brings afternoon convective rainfall and can introduce day-to-day variability in peak temperatures within the 29°C to 33°C range.

Market Timeline

Jul 7, 4:02 AM
Market Created
Jul 7, 4:02 AM
Market Opened
12:00 PM
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.