Temperatures were in the teens when what became an intensive search for the Spring Valley Road man began around 6 a.m.
They'd only reached the low 20s when Detective Lt. John Devine, who was among those searching for him, found the man in nearby Van Saun Park several hours later, Police Chief Kenneth Ehrenberg said.
He was taken to New Bridge Medical Center for observation, the chief said.
Click here to follow Daily Voice Paramus and receive free news updates.