Paris June 12 Low Temperature: 15C at 47.5%

Paris weather markets are rarely this interesting. The contract asking for the lowest temperature recorded in Paris on June 12 has 15°C sitting at a 47.5% implied probability, after a sharp 15% price jump in the last 24 hours. That move is the story. One outcome in an eleven-way field nearly doubled its probability in a single session, and the market is now split almost evenly between YES and NO.

The market question asks: what will the lowest temperature in Paris be on June 12? The YES price on 15°C sits at 0.48. The NO price is 0.53. This contract resolves at noon Paris time on June 12, 2026. Total volume traded stands at $4,063, with $3,099 of that arriving in the last 24 hours.

How the Paris Temperature Contract Works

This is a single-outcome contract in a multi-option field. YES pays out if the official low temperature recorded in Paris on June 12 hits exactly 15°C. Any other reading, whether 14°C, 16°C, or any of the nine other listed outcomes, resolves this contract as NO. The resolution source is the market’s designated weather data provider, applied to the June 12 observation window.

• YES (15°C): priced at 0.48, implying a 47.5% probability that the Paris low lands exactly at 15°C.
• NO (any other outcome): priced at 0.53, implying a 52.5% probability that the low falls on a different value.

A NO resolution here does not require an extreme temperature event. It simply requires the Paris low to land on any of the other ten listed outcomes: 16°C, 17°C, 14°C, 13°C, 18°C, 12°C, 19°C, 11°C, 20°C or higher, or 10°C or below. Mid-June Paris lows typically cluster between 13°C and 17°C. That means several adjacent outcomes each carry real probability, and the field is genuinely competitive.

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Momentum and Market Signals

The momentum composite here is unambiguous. A 15% price gain in 24 hours, a flat one-hour reading, and a trend score of 49.56 point to a single burst of conviction followed by a pause. The most likely driver is a model update or a new short-range forecast dropping the expected Paris low for the night of June 11 into June 12 squarely at 15°C. When forecasters converge on a single number, money follows.

Total volume is $4,063. The 24-hour volume of $3,099 represents roughly 76% of all trading in this market arriving in one session. Liquidity sits at $18,738, which is healthy relative to volume but the overall market size is thin. With total volume well under $1M, a single large trade or a forecast revision can move this price sharply before resolution.

• The 15% 24-hour price gain on 15°C reflects a sudden shift in forecaster consensus, not a gradual drift. That kind of move in a weather market almost always traces back to a model run.
• The one-hour change is flat at 0%, which suggests the initial burst of conviction has settled and the market is now waiting for updated forecasts closer to the observation window.
• Liquidity of $18,738 against $4,063 in volume means the order book is relatively deep for this market size. Price is not being moved by thin order books alone.
• The trader sentiment breakdown reads 47.5% YES versus 52.5% NO, which is essentially a coin flip. The market has not reached consensus on this outcome.
• Nine alternative outcomes remain live. That distributes probability across a wide field, which structurally limits how high any single outcome can climb.

Lines Analysis: Paris Temperature on June Twelve

The case for 15°C rests on short-range forecast convergence. When European weather models and GFS agree on a specific overnight low, multi-option temperature markets respond fast. The 15% jump in 24 hours is consistent with exactly that kind of signal. Paris sits at roughly 49°N latitude. In mid-June, the city’s overnight lows are sensitive to cloud cover, wind direction, and whether Atlantic moisture is moving through. A calm, partly cloudy night with westerly flow commonly produces a low right in the 14°C to 16°C range, making 15°C a credible central estimate.

The genuine risk to YES is the spread across adjacent outcomes. Each of 14°C and 16°C likely holds meaningful probability. Temperature forecasts at single-degree resolution carry real uncertainty even 12 to 18 hours out. A forecast showing 15°C at 10pm can easily verify at 14°C or 16°C by sunrise. The NO side does not need a cold snap or a heat wave. It just needs the thermometer to land one degree off.

• Updated short-range model runs from ECMWF or GFS in the next 12 hours will either reinforce or undermine the 15°C consensus. Watch for the 0.48 price to move on any new model output.
• Observed temperatures at Paris-Orly or Charles de Gaulle airports in the late evening of June 11 will give early signals for the overnight trajectory.
• Cloud cover and wind speed forecasts are the primary meteorological variables. Clear skies with light winds push the low lower. Overcast conditions with southerly flow push it higher.
• Any revision in the forecast toward 14°C or 16°C will pull probability away from YES rapidly given how thin the total volume is.
• Resolution timing at noon June 12 means the full overnight low window will be captured. The market is pricing the full night, not just a single reading.

Total volume of $4,063 is thin. The data right now favors 15°C as the market’s best single estimate, but the multi-outcome structure means NO holds structural weight by design. Nine other outcomes share the remaining 52.5% probability. The market is pricing genuine meteorological uncertainty, not a settled forecast.

LINES VERDICT

Narrow Favorite in a Wide Field

The 15% move in 24 hours shows real forecast conviction behind 15°C, but a single-degree weather market this close to resolution is always a coin flip at best.

What the market says: 47.5% probability means the market treats 15°C as the most likely single outcome without treating it as probable. With resolution in under 36 hours, this price will move on every new model run.

Key unknown: The next ECMWF or GFS model cycle covering the Paris overnight window for June 11 into June 12 is the single most important data point. If models shift even half a degree, probability migrates to 14°C or 16°C immediately.

Scientific Context: June Temperature Patterns in Paris

Paris recorded a June climatological mean overnight low of approximately 13°C to 14°C over the long-term baseline, with mid-June averages running slightly warmer. Recent years have shown a bias toward warmer overnight lows as the urban heat island effect intensifies and background warming continues. A 15°C low on June 12 is consistent with current climatological norms and sits one to two degrees above the long-run average. That alignment with recent observed patterns helps explain why 15°C attracted the most capital in this field.

The eleven-way structure of this market means the leading outcome sits near 47.5% while the field collectively holds the rest. That is not unusual for a single-degree resolution weather market. What would move price before the June 12 noon resolution is any operational forecast shifting its central estimate. The data doesn’t care about the politics of which model you prefer. Here’s what the measurements are telling us: 15°C is the market’s best guess, and the market is pricing uncertainty, not science.

What is the probability on this contract?

The YES contract on 15°C is currently priced at 47.5%. That means traders collectively assign roughly a one-in-two chance that the Paris low on June 12 lands exactly at 15°C.

What does NO mean here?

NO pays out if the Paris low on June 12 lands at any value other than 15°C. That includes all ten listed alternatives, from 10°C or below up to 20°C or higher.

What data would move this price?

A new short-range forecast from ECMWF or GFS showing a consensus overnight low different from 15°C would shift probability to adjacent outcomes quickly, given how thin the total volume is.

When does this contract resolve?

Resolution is set for June 12, 2026 at noon. The market captures the full overnight low window for that date in Paris.

Is the volume reliable here?

Total volume is $4,063, which is well under $1M. Liquidity of $18,738 offers some depth, but this is a thin market. A single moderately sized trade can move the price meaningfully before resolution.