Warsaw Hit 20°C on July 8, 2026 | Lines.com

Warsaw recorded a daily high of 20°C on July 8, 2026, resolving the Polymarket temperature bracket market at full value. The 20°C outcome was confirmed by the market’s resolution source before the noon deadline on July 8. Traders holding the 20°C bracket collected the full payout as all competing brackets expired worthless.

The 20°C bracket opened the market period at 34 percent probability, reflecting trader skepticism that Warsaw would land in that specific band rather than a warmer range. That price surged 46.5 percent in the final 24 hours as real-time observations aligned with the outcome. The market closed at 100 percent, meaning the probability moved from a minority position to certainty as the day’s measurements confirmed the result.

Warsaw Recorded 20°C on July 8, Closing the Bracket Market

The Polymarket market structured Warsaw’s July 8 high temperature as a set of discrete brackets: 13°C or below, 14°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C, 21°C, 22°C, and 23°C or higher. Only the 20°C bracket resolved YES. Every other bracket expired at zero. Warsaw’s actual July 8 maximum temperature landed exactly within the 20°C range, triggering full resolution for that outcome alone.

Early July in Warsaw typically sees daily highs near 23°C to 24°C based on historical seasonal norms, placing the confirmed 20°C reading below the seasonal average. A cooler air mass over central Poland on July 8 kept temperatures from reaching those typical summer levels. The 20°C result represented a meaningful departure from what traders initially expected.

The final hours of trading reflected that shift. The 20°C bracket price climbed steadily through July 7 and accelerated sharply on July 8, rising 11.5 percent in the morning hours before the noon resolution cutoff. By the time the market closed, the price had reached 1.00, consistent with an outcome that was no longer in question.

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How the Market Priced a Below-Average Warsaw Day

The 20°C bracket carried a 34 percent implied probability at market open. That price reflected a market distributing probability across multiple temperature outcomes, with traders collectively favoring warmer brackets given Warsaw’s July climatology. The data does not care about those expectations. Warsaw hit 20°C, and the market had underpriced that outcome by a meaningful margin at the outset.

Total volume reached $52,458, with $38,591 of that, or roughly 74 percent, trading in the final 24 hours. That late concentration signals traders updating on intraday temperature data rather than acting on advance forecasts. Liquidity stood at $210,584, a figure that supported clean price discovery as the outcome became clear. The market functioned as intended: prices moved toward certainty as real-world measurements arrived.

• Resolution Outcome: 20°C bracket resolved YES on July 8, 2026.
• Article-Time Probability: 34 percent at market open.
• Final Price at Close: 100 percent (1.00).
• Total Volume: $52,458 across the market’s lifetime.
• Market Assessment: Underpriced YES. The 20°C bracket opened below 50 percent and resolved at full certainty.

What the 20°C Result Means for Warsaw Temperature Markets

Warsaw’s July 8 reading landing at 20°C illustrates a recurring challenge in daily temperature bracket markets: probability distribution across a wide range of outcomes makes any single bracket a minority position at open. The 20°C outcome was below seasonal norms, which pulled initial prices toward warmer brackets. Real-time meteorological data, not seasonal averages, determined the result. That gap between climatological prior and actual atmospheric conditions is where this market’s pricing error originated.

The bracket structure served its purpose here. Once intraday temperature data confirmed the 20°C range, the price update was fast and decisive, moving from minority probability to full resolution within a single trading day. The narrow resolution window, tied to a noon deadline, limited the time for price adjustment, but the $38,591 in final-day volume shows traders found and used the signal quickly.

• Warsaw’s early July seasonal average of roughly 23°C to 24°C pulled initial market probability toward warmer brackets, creating a structural underpricing of the 20°C outcome from day one.
• The 74 percent share of volume arriving in the final 24 hours reflects the value of intraday weather observation data in resolving short-duration temperature markets.
• Polymarket’s bracket structure for daily temperature markets rewards traders who correctly identify below-average days, because the market consistently underweights cooler outcomes when historical averages skew warmer.
• The strong positive correlation with the Hong Kong July 8 temperature market suggests broad atmospheric patterns influenced multiple simultaneous temperature markets, a factor not captured in single-city bracket pricing.

LINES RESOLUTION VERDICT

UNDERPRICED YES

Warsaw’s July 8 high of 20°C came in below seasonal norms, exposing a structural bias in temperature bracket markets that anchor initial pricing to historical averages rather than short-range forecast models.

What the market showed: The 20°C bracket opened at 34 percent implied probability and closed at 100 percent. Traders underweighted the cooler outcome at the start and corrected rapidly once intraday measurements confirmed the result.