Paris Hit 29°C on July 5: Temperature Market Resolves | Lines.com

Paris recorded a daily high of 29°C on July 5, 2026, resolving this multi-outcome temperature market in favor of the 29°C bucket. The Polymarket contract closed at full resolution, with the outcome confirmed by the official recorded maximum for the day. Among eleven possible temperature brackets ranging from 26°C or below to 36°C or higher, the 29°C outcome emerged as the correct call.

The market opened the 29°C bucket at just 35%, reflecting genuine spread across competing outcomes. Traders eventually pushed the price to 100% as real-time temperature data confirmed the result on July 5. A total of $151,420 in volume moved through this contract, with $112,440 of that arriving in the final 24-hour window. The math doesn’t lie: the market was substantially underpriced at the open, then corrected hard and fast on resolution day.

Paris Temperature Confirmed at 29°C on July 5, 2026

The 29°C outcome resolved YES on July 5, 2026 at 12:00 UTC. The resolution source confirmed the daily maximum temperature for Paris matched the 29°C bracket exactly. This was a narrow precision market: each bucket covered a single degree Celsius, so the 29°C outcome required the temperature to land precisely in that range and not in the adjacent 28°C or 30°C brackets.

The final hours told the story cleanly. The contract dropped 8.5% on July 4, suggesting forecast models briefly shifted weight toward adjacent temperature brackets. Then on July 5, the price surged 18.1% in one move and followed with a second surge of 33.1% as real-world temperature readings locked in the result. By close, the 29°C bucket sat at 100% with no remaining ambiguity.

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How the Market Performed on the 29°C Outcome

The 29°C bucket opened at 35% implied probability, placing it well below even odds at market open. That pricing made sense given the multi-outcome structure: with eleven possible brackets, any single bucket faces structural pressure on probability. Here’s what the market is missing when analysts dismiss thin single-bucket pricing: the 35% opening price for a correct outcome still counts as underpriced YES, and traders who held through the July 4 dip were rewarded.

The final closing price reached 100%, confirming the outcome was fully resolved and not contested. Total volume of $151,420 and liquidity of $165,431 provided solid price discovery given the narrow contract scope. The $112,440 that arrived in the final 24 hours represented 74% of total volume, signaling that traders committed real capital only when meteorological certainty arrived.

• Resolution Outcome: 29°C daily maximum confirmed for Paris on July 5, 2026.
• Article-Time Probability: 35% at market open (implied probability for the 29°C bucket).
• Final Price at Close: 100% (fully resolved YES).
• Total Volume: $151,420.
• Market Assessment: Underpriced YES at open. Correct convergence on resolution day.

What the Paris Temperature Result Means Going Forward

A 29°C high on July 5 places Paris within a historically moderate range for early July. The city’s average July maximum sits near 25°C, making a 29°C reading warm but not extreme. This result does not approach the heat event thresholds that have prompted emergency protocols in France in prior years. The outcome matters for how Polymarket and similar platforms will price future single-city, single-day temperature markets during European summer months.

The binary bucket structure worked reasonably well here, but the 11-outcome spread compressed individual bucket probabilities substantially at open. A 35% opening price for a correct outcome reflects structural pricing challenges in multi-bracket meteorological markets, not a failure of forecasting. Future markets covering Paris summer temperatures may see tighter opening ranges if forecasters can narrow uncertainty to two or three adjacent brackets closer to the event date.

• Météo-France forecast accuracy for Paris in the 48-hour window before July 5 will influence how aggressively traders price adjacent temperature brackets in future summer contracts.
• The July 4 dip in the 29°C bucket price suggests that late-breaking forecast revisions can move capital significantly even within a 24-hour window, creating late-entry opportunities for well-informed traders.
• Paris summer temperature markets with narrow per-degree brackets will likely attract higher 24-hour volume concentration near resolution, as real-time readings displace forecast uncertainty.
• The $165,431 in liquidity exceeded total traded volume, suggesting market makers maintained depth without being overwhelmed, a positive signal for this contract structure’s viability.

LINES RESOLUTION VERDICT

CORRECTLY RESOLVED: UNDERPRICED AT OPEN, ACCURATE AT CLOSE

The 29°C bucket resolved exactly as temperature data confirmed, but the market’s 35% opening price reflects the structural challenge of single-degree precision markets, not a mispricing of the broader Paris temperature outlook.

What the market showed: The 29°C bucket opened at 35% implied probability and closed at 100%. The market was underpriced at open given the eventual outcome, with 74% of total volume arriving in the final 24 hours as meteorological certainty replaced forecast uncertainty.