Historical weather data, all-time temperature records, and monthly climate averages for Edison, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Edison runs cool but variable — the average high is 58° with a low of 39°, though the date has seen everything from a balmy 79° back in 1981 to a teeth-chattering 26° in 1995. There's a coin-flip chance of rain today (54% historically), so keep an umbrella handy, but at least snow is off the table.
Edison's weather has real range — from a scorching 105° on July 7, 2010 to a brutal -13° on January 22, 1984, that's a 118-degree swing between extremes. The wettest single day on record dumped 7.96 inches during Tropical Storm Irene on August 28, 2011, and a February 2006 snowstorm buried the area under 19.8 inches in a single day.
Summer is peak warmth here, with highs averaging 88° during the hottest week of the year (July 16–22), while mid-January bottoms out around 38°. The wettest stretch falls in late July, averaging 1.39 inches per week — so summer brings both the heat and the storms. Spring and fall offer the most comfortable conditions, with April and October highs in the low-to-mid 60s.