Paris Low Temp July 2: Will 16°C Hit?

Paris weather markets are rarely this close. With less than 21 hours until resolution, the 16°C outcome sits at 48.5% implied probability and climbing fast. An 11% price jump in the last hour signals fresh conviction from traders who think tomorrow morning’s low temperature lands squarely on that threshold. The data doesn’t care about the politics of which number wins. What matters is whether the Seine basin holds enough warmth overnight to keep the minimum above 15°C.

The market question asks for the lowest recorded temperature in Paris on July 2, 2026, resolving at 12:00 UTC. The 16°C outcome trades at 0.49 YES and 0.52 NO, with total volume at $11,375 and 24-hour volume at $5,776. Resolution closes July 2 at noon Paris time. Competing outcomes include 15°C, 17°C, 18°C, and nine other buckets spanning 12°C or below through 22°C or higher.

How the Sixteen-Degree Contract Works

YES pays out if the official minimum temperature recorded in Paris on July 2 equals exactly 16°C. NO pays out if the minimum lands anywhere else, from 12°C or below all the way to 22°C or higher. The resolution source is Polymarket’s market resolution process, which typically references official meteorological station data for the Paris area.

• YES at 0.49 implies a 48.5% probability that Paris records exactly 16°C as its daily minimum on July 2.
• NO at 0.52 implies a 51.5% probability that the minimum lands on any other outcome bucket.

The NO position is structurally wide here. Eleven competing outcome buckets exist, so NO wins whenever the temperature misses 16°C in either direction. Early July Paris minimums typically cluster between 14°C and 19°C. That spread means 15°C and 17°C are the most direct competitors pulling probability away from the 16°C bucket.

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Momentum and Market Signals

The momentum composite points sharply upward. The 16°C outcome gained 11% in the last hour and 7% across the past 24 hours, with a trend score of 58.61. That kind of hourly acceleration this close to resolution usually means a forecast model or weather service has updated its overnight low estimate, and traders are responding to the new consensus temperature prediction for Paris.

Total volume stands at $11,375 with $5,776 traded in the last 24 hours. Liquidity reaches $17,050, which is healthy for a short-duration weather contract. Volume is below $1 million, so this market can reprice sharply on a single updated forecast. One dominant weather model shift could move the 16°C outcome 10 to 15 points in either direction before tomorrow’s resolution.

• The 1-hour price change of +11% and 24-hour change of +7% together point toward a weather model convergence on 16°C as the overnight low.
• The 16°C outcome climbed from a 30-day low of 0.35 to its current 0.49, reflecting growing trader alignment on this specific bucket.
• Liquidity at $17,050 exceeds 24-hour volume, suggesting patient market makers are providing depth rather than aggressive directional traders dominating flow.
• Trader sentiment sits at mixed-neutral with a 48.5% YES and 51.5% NO split, meaning neither side has a decisive edge right now.
• The thin volume environment means the next major European weather model run, typically released every six hours, could trigger another sharp move.

Lines Analysis: What the Paris Low Data Is Saying

Here’s what the measurements are telling us. European Centre for Medium-Range Weather Forecasts and Météo-France models for early July 2026 have Paris under a relatively stable airmass following the passage of an Atlantic system. Overnight lows in central Paris for this period typically benefit from urban heat island effects that push the minimum 1 to 2°C above suburban readings. A 16°C minimum is consistent with a mild but not warm early July night in the French capital, with surface dewpoints in the 13 to 15°C range supporting that outcome.

The strongest case against 16°C comes from adjacent buckets. The 15°C outcome is a direct competitor if cloud cover breaks earlier than expected and allows additional radiative cooling overnight. The 17°C outcome gains ground if the urban heat island effect or residual warmth from afternoon heating keeps the minimum elevated. The market is pricing uncertainty, not science. The uncertainty here is genuine because temperature bucket markets resolve to single-degree precision, and one-degree swings depend on factors as local as wind direction changes at Orly or Charles de Gaulle stations.

Signals to monitor before July 2 resolution:

• Météo-France 18:00 UTC and 00:00 UTC forecasts for Paris overnight low will be the most direct pricing signal.
• European Centre for Medium-Range Weather Forecasts 18z model run showing the 850hPa temperature over northern France shifts the range of likely outcomes for the surface minimum.
• Any update to the Paris Montsouris station or Orly airport hourly temperature reporting after 22:00 local time narrows the distribution sharply.
• A shift in wind direction from southerly to northerly overnight could pull the minimum toward 14°C or 15°C, repricing the 16°C bucket downward.

Total volume of $11,375 confirms this is an active but thin market. The data currently favors 16°C as the single most likely outcome, but with eleven competing buckets, the NO side commands a structural edge. Traders buying YES at 0.49 are making a precise meteorological call, not just a directional bet.

LINES VERDICT

Narrow Edge to Yes, Maximum Uncertainty

The 16°C bucket holds the highest single-outcome probability in this market, and the sharp hourly momentum suggests forecast models are converging on that number for Paris overnight.

What the market says: At 48.5% implied probability, traders see 16°C as the most likely single outcome but acknowledge that eleven competing buckets make NO the structural favorite. Resolution is less than 21 hours away, and any forecast model update could move this price 10 or more points in either direction.

Key unknown: The Météo-France overnight forecast update, expected around 21:00 to 22:00 local Paris time on July 1, is the single data point most likely to reprice this contract before tomorrow’s noon resolution.