Historical weather data, all-time temperature records, and monthly climate averages for Marlboro, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Marlboro typically lands right in that transitional sweet spot — average highs of 58° with lows still dipping to 36° overnight. The date has seen wild swings across 108 years of records, from a balmy 78° as recently as 2023 to a brutal 21° low back in 1995. There's about a 1-in-3 chance of rain today, but snow is nearly off the table at just 2%.
Marlboro's weather history is not for the faint of heart — the thermometer has swung from a scorching 106° in July 1936 to a bone-chilling -20° in February 1934, a 126-degree spread. The wettest single day on record dumped 8.23 inches during Tropical Storm Irene in August 2011, and a February 1899 snowstorm buried the area under 20 inches in a single event.
Summer is Marlboro's signature season, with average highs peaking around 87° in mid-July and humidity to match — late July is also the wettest stretch of the year. Winter bottoms out in mid-January with average highs of just 39°, making the December-through-February window the one to pack accordingly for. Spring and fall offer the most comfortable window, with April through May and September through October delivering mild highs in the 60s and 70s.