The Bottom Line Several waves of low pressure will ride along a frontal boundary to produce 3 or 4 spurts of rain over New Jersey through midweek. So we’re grabbing the umbrella - but not necessarily the jacket, as temperatures stay on the warm side of normal. Despite the unsettled forecast, we can look for some bright spots of dry, sunnier weather along the way. Monday After summerlike 80s on Sunday, it’s going to be considerably cooler across most of New Jersey on Monday (by 10+ degrees). It’s a comfortable start to the day, with temperatures on either side of 60 degrees. Sunshine will be very limited. And a passing shower will be possible at any time throughout the day - you might want to carry an umbrella, just in case.