Heat ramps up Thursday to match the high humidity, as our next Jersey heat wave begins. The heat index, the “feels like” or “apparent” temperature, will flirt with 100 degrees, on the edge of “dangerous heat” territory. Normal high temperatures range from 85 to 86 degrees, while normal low temperatures range from 66 to 69 degrees. Wednesday will not be especially hot, with high temperatures only in the lower 80s. ThursdayFor the first time in three weeks, it's time for another Jersey heat wave.