Historical weather data, all-time temperature records, and monthly climate averages for Hillside, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Hillside sits right in the swing of spring — expect a high near 55° and a low around 40°, though the date has seen everything from 73° (1988) to a teeth-chattering 24° (1995). There's about a 1-in-3 chance of rain, but snow is essentially off the table at just 1%.
Hillside has seen some serious extremes over its 78 years of records — from a scorching 104° on July 3, 1966 to a brutal -2° on January 21, 1985, a swing of 106 degrees. The wettest single day on record dumped 8.05 inches during the remnants of a storm on September 29, 2023, and a January 2016 blizzard buried the area under 30.3 inches of snow in a single event.
Summer is the sweet spot, with highs peaking around 83–85° in mid-to-late July — the warmest stretch of the year. Winter bottoms out in mid-January with average highs of just 38°. Rain is fairly well distributed year-round, but late July is the wettest stretch, averaging nearly an inch per week.