Miami Hit 94-95°F on July 5, Topping Most Forecasts | Lines.com

Miami International Airport recorded a daily high of 94 to 95 degrees Fahrenheit on July 5, 2026, pushing into a temperature band that most pre-market forecasts considered an outside possibility. The reading at KMIA, sourced from Weather Underground, confirmed the outcome and triggered full resolution of the Polymarket contract on July 5, 2026.

The market opened this contract at 47% implied probability for the 94-95°F band, a modest starting price that reflected genuine forecaster uncertainty. By the time resolution hit, the contract had reached 100%. Total volume of $89,859 signaled real trader conviction, and the final surge in price on July 5 showed the market repriced aggressively as the afternoon heat materialized.

Miami Temperature Reached 94-95°F, Confirming the High-End Band

Weather Underground data for the Miami Intl Airport Station (KMIA) showed the July 5, 2026 daily high falling in the 94-95°F range. That result placed Miami’s peak temperature above the historical July average of roughly 89 to 90°F for the station. The reading resolved the Polymarket contract decisively, with no ambiguity about which temperature band applied.

The contract had seen two notable price moves on July 5 itself: a 10.5% jump early in the day and a 30.9% surge as the high became clear. By close, the final probability sat at 100%. The market did not drift into resolution; it snapped there as real-world data arrived.

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How the Market Performed Against the Outcome

The 94-95°F band opened at 47% implied probability, meaning traders initially viewed the outcome as a coin flip, leaning slightly toward lower temperature bands in the 88-93°F range that climatological averages support. The market was underpriced for the actual outcome at open. The gap between 47% at open and 100% at resolution represents a meaningful miss in early pricing, even if the final close was accurate by definition.

Total volume reached $89,859, with $53,749 of that trading in the final 24 hours. Liquidity stood at $504,344, providing a deep enough pool for meaningful price discovery. The heavy late-session volume drove the price to certainty, but the early market underweighted the high-temperature scenario.

What the Miami Heat Reading Means Going Forward

A daily high of 94-95°F at KMIA sits roughly 4 to 5 degrees above the station’s historical July norm. Miami’s subtropical climate produces regular high-heat days in summer, but readings in this band reflect a combination of anomalous heat, low wind speeds, and high moisture that compound the apparent temperature. The July 5 result adds one more data point to a pattern of Miami summers trending hotter over the past decade.

For prediction markets structured around temperature bands, the July 5 contract illustrates a structural challenge: short-range weather forecasts compress uncertainty, but the tails, readings that push above the 92-93°F range, remain underpriced until the day itself. The binary band structure captured the resolution cleanly, but early market participants consistently favored the climatological median over the high end.

• Miami’s KMIA daily highs in the 94-95°F range are rare enough that traders anchored to the 89-93°F climatological average, underweighting heat spike risk at open.
• The 30.9% single-day price surge on July 5 confirms that real-time weather data, not forecast models, drove final market accuracy.
• July and August 2026 temperature markets for Miami and other subtropical cities will need to price in a wider tail distribution based on recent seasonal trends.
• NOAA and NWS short-range model guidance for Miami consistently centers on the 88-93°F range for July; markets that rely on model consensus alone will systematically undervalue extreme bands.

LINES RESOLUTION VERDICT

UNDERPRICED YES AT OPEN, CORRECTLY RESOLVED

The Miami July 5 temperature market resolved cleanly to 94-95°F, but the early market underpriced this band at 47%, showing that climatological anchoring consistently leaves high-heat tails undervalued until real-time data forces repricing.

What the market showed: The 94-95°F band opened at 47% implied probability, closed at 100%, with $89,859 in total volume. The market was accurate at resolution but significantly underpriced the winning outcome at open.