Resolves to Yes if the Highest temperature in NYC on the specified day is higher than the previous day 

Resolves to No otherwise (in case of a tie, resolves to No) 

Highest temperature according to National Weather Service Weather Forecast Office's daily Climatological Report 

https://forecast.weather.gov/product.php?site=OKX&issuedby=NYC&product=CLI&format=CI&version=1&glossary=0

Note: Two reports are issued each day: one around 4:30 PM and another around 1 AM the following day. The report issued around 1 AM summarizes the highest temperature of the day that just ended and will be used for resolving this market.