Historical weather data, all-time temperature records, and monthly climate averages for Ronkonkoma, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Ronkonkoma sits squarely in the transitional zone — expect a cool 53° high and 38° low on average, though the date has swung anywhere from 75° (2010) to a frosty 26° (1972). There's nearly a coin-flip chance of rain today, but snow is off the table.
Ronkonkoma's weather has real range — 118 degrees of it, to be exact, spanning from a brutal -14° in February 1967 to a scorching 104° in July 1966. The wettest single day on record dumped 13.51 inches on August 13, 2014, and a January 2022 storm buried the area under 23.5 inches of snow.
Summer is the sweet spot, with highs peaking around 84° in late July before gradually cooling into fall. January is the harshest month, with average highs barely cracking 37°. August is the wettest stretch of the year, so pack accordingly if you're visiting late summer.