NYC Low Temp Hit 66-67°F on July 6, 2026 | Lines.com

New York City recorded a low temperature of 66 to 67 degrees Fahrenheit on July 6, 2026, resolving this Polymarket temperature range market at full value. The measurement came from the LaGuardia Airport station (KLGA) via Weather Underground, the designated resolution source. NYC’s overnight low landed squarely in the middle of the available range bands, confirming a mild summer night rather than the oppressive heat some traders initially expected.

The market opened at 30% implied probability for the 66-67°F outcome, meaning the majority of early trading capital pointed elsewhere. By close, the contract hit 100%, with the final 24-hour window delivering a 64.5% price surge. Total volume reached $37,416, a figure that reflects focused short-term conviction rather than sustained long-range forecasting. The market got there in the end, but the path exposed real uncertainty about NYC’s July temperature floor.

NYC Recorded a 66-67°F Low as the 66-67°F Band Resolved YES

LaGuardia Airport’s KLGA station logged the overnight minimum within the 66-67°F range on July 6, 2026. Weather Underground’s summary data table for KLGA served as the authoritative source, consistent with how Polymarket structured the resolution criteria. The outcome placed NYC’s overnight low above the cooler bands (59°F or below through 64-65°F) and below the warmer bands (68-69°F through 78°F or higher), landing in a moderate position across eleven total outcome options.

The final hours of trading reflected growing consensus. The contract gained 16% in one wave on July 6, then another 8.5%, then 20.5%, three distinct moves that compressed uncertainty as actual temperature data came into view. By the time the market closed at noon EDT on July 6, the 100% price left no ambiguity. Traders converged on the correct band, but only after the meteorological picture clarified in real time.

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How the Market Priced a Narrow Temperature Band

The 66-67°F outcome resolved YES against an opening implied probability of just 30%. That gap, from 30% at open to 100% at close, reflects how poorly the market initially distributed probability across the eleven available bands. Early traders spread conviction across warmer outcomes, likely anchored to July’s historical heat in New York. The data didn’t cooperate with that assumption. Here’s what the measurements are telling us: July 6 behaved more like a mild early-summer night than a peak heat event.

Total volume of $37,416 with $23,350 changing hands in the final 24 hours shows this was a late-resolving market. Most capital arrived after the outcome was approaching certainty. Liquidity of $384,912 provided deep price discovery infrastructure, but the trading pattern suggests the market was pricing uncertainty, not science, for most of its life. The surge to 100% was correction, not prediction.

MARKET PERFORMANCE SUMMARY

• Resolution Outcome: 66-67°F (YES)
• Article-Time Probability: 100% (fully resolved)
• Final Price at Close: 1.00 (100%)
• Total Volume: $37,416
• Market Assessment: Underpriced YES (opened at 30%, resolved 100%)

What a Mild July 6 Night Means for Summer Temperature Forecasting

NYC’s overnight low of 66-67°F on July 6 fits within the broad range AccuWeather projected for July 2026 overnight temperatures, which spanned 64°F to 74°F across the month. A low in the lower half of that range on an early July night is consistent with a transitional weather pattern rather than sustained heat dome conditions. The data doesn’t care about the politics of summer forecasting: the atmosphere delivered a moderate result.

For prediction market design, this outcome highlights the challenge of multi-band temperature contracts. With eleven outcome bands, the correct answer held only 30% opening probability, meaning the market structure itself dispersed early capital away from the eventual winner. Binary contracts, or tighter three-band structures, would likely generate more accurate early pricing for events with this many possible outcomes.

FORWARD SIGNALS

• NYC’s July 2026 overnight low range of 64°F to 74°F remains consistent with historical July patterns at LaGuardia, suggesting future temperature markets should weight mid-range bands more heavily at open.
• The strong positive correlation with the highest temperature in Hong Kong on July 7 suggests both markets tracked the same Northern Hemisphere warm-season pattern, which could inform cross-market positioning on related temperature contracts.
• Late-breaking volume (62% of total arriving in the final 24 hours) points to a forecasting market that rewards real-time data integration over long-range meteorological modeling.
• Multi-band temperature markets on Polymarket may systematically underprice the median outcome band at open, creating a structural inefficiency that traders familiar with probability distributions can exploit.

LINES RESOLUTION VERDICT

UNDERPRICED YES

The market correctly resolved to 66-67°F, but the initial 30% pricing on the winning band exposed how early capital misjudged NYC’s July 6 overnight floor, a calibration gap that closed only as real-time data arrived.

What the market showed: The 66-67°F band opened at 30% implied probability and resolved at 100%. With eleven outcome bands and a final 24-hour surge of 64.5%, the market was pricing uncertainty, not science, until meteorological reality forced convergence in the final hours.