Historical weather data, all-time temperature records, and monthly climate averages for Roselle, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Roselle typically lands in that shoulder-season sweet spot — expect a high around 56° and a low near 38°, with rain possible but unlikely. The date has seen wild swings, though: 82° in 1950 and a bitter 23° just four years later in 1954.
Roselle has felt the full force of the Mid-Atlantic climate, from a scorching 108° in July 2011 to a bone-chilling -14° in February 1934. A single August day in 1843 brought a staggering 15 inches of rain, and the day after Christmas 1947 buried the area under 25.9 inches of snow.
Summer is the main event here — highs peak around 85-86° in mid-to-late July, while January and early February bottom out near 37-40°. Late July is also the wettest stretch of the year, so pack accordingly if you're visiting then. For the most comfortable conditions, aim for May or September, when highs are in the low-to-mid 70s.