Highest temperature in NYC on August 9?

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Market context

The latest change is that New York has stayed in a warm, humid regime rather than breaking into a cooler pattern, with LaGuardia reporting 88.0°F in the early afternoon on 9 August and a 6-hour high of 89.1°F in the WeatherSpark hourly log. Current forecast material around the day pointed to a high near 90°F, which keeps the market anchored around the upper-80s to low-90s band rather than the cooler bins. [1][5]

For context, late-summer highs at LaGuardia often move through the 80s into the low 90s when the air mass is tropical, but the exact market wording matters because settlement follows the highest temperature in Weather Underground’s Daily Observations table, not the summary high. That means a late-afternoon or early-evening uptick can matter more than the headline daily high if the table captures a slightly different peak. [4][5][12]

The main catalysts now are the final observation updates from KLGA and any revision before Weather Underground locks the day’s record after the first datapoint for 10 August appears. Traders should watch whether the station creeps above 89°F, because that would shift the outcome from the current crowd-led no-signal 0% YES reading towards a 90-91°F-type settle; if temperatures stall just below 90°F, the lower bin remains favoured. The National Weather Service’s New York briefing and daily climate products are useful cross-checks, but the market resolves off the Wunderground station record itself. [3][10][12]

Sources: 1 · 2 · 3 · 4 · 5

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