Confirmed on Mediabase.com for Tuesday 7/6/2010 on WCBS-FM:
2:44 PM LOVE, DARLENE Winter Wonderland (Philles)
From the National Weather Service in NYC:
RECORD EVENT REPORT...CORRECTED
NATIONAL WEATHER SERVICE NEW YORK NY
445 PM EDT TUE JUL 06 2010
...RECORD HIGH TEMPERATURE SET AT CENTRAL PARK NY...
A RECORD HIGH TEMPERATURE OF 103 DEGREES WAS SET AT CENTRAL PARK NY
TODAY AT 311 PM (EDT). THIS BREAKS THE OLD RECORD OF 101 SET IN 1999.
On Wednesday 7/7/10, it "only"

hit 100 degrees in NYC's Central Park at 2:28pm EDT, breaking the old record of 98 degrees set back in 1993.