Historical weather data, all-time temperature records, and monthly climate averages for Summit, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Summit lands right in the thick of spring's push, with an average high of 57° and low of 35° across 94 years of data. The date has seen wild swings though — a balmy 79° back in 1981, and a brutal 12° in 1954. There's about a 4-in-10 chance of rain today, but snow is nearly off the table at just 1%.
Summit's weather has serious range: a scorching 107° in July 2010 and a bone-chilling -26° in February 1934 — a spread of 133 degrees between the extremes. The wettest single day on record dumped 8.76 inches in August 1971, and a January 1961 storm buried the area under 20 inches of snow.
Summit peaks in late July, when average highs reach 87°, then bottoms out in mid-January at a chilly 38°. The wettest stretch of the year falls in late July as well, averaging 1.36 inches per week — so summer visits come with both heat and humidity. Spring and fall offer the most comfortable conditions, with April and October highs in the low-to-mid 60s.