What to expect when you step outside. Today, an air quality alert and a high of 96 degrees by 5pm. More extreme heat and some rainy weather coming our way. We are going to reach nearly 100 degrees today, Thursday, August 4. The rest of the week and into the weekend will be between 70 and 90 degrees with a potential for rain Friday through Sunday. Your Morristown, NJ, 5-day forecast… … Weather outlook for Friday, Aug 5 — Tuesday, Aug 9