Historical weather data, all-time temperature records, and monthly climate averages for Merrick, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Merrick sits in that classic early spring in-between zone — average highs of 55° and lows of 40°, but the range of outcomes is wide. This date has swung from a balmy 73° in 1988 all the way down to a bitter 24° in 1995. Snow is essentially off the table at just 1%, though there's still a roughly 1-in-3 chance of some rain.
Merrick's weather history has some dramatic bookends: a scorching 104° on July 3, 1966 and a brutal -2° on January 21, 1985, a swing of 106 degrees. On the wet side, Hurricane Ida dumped a staggering 8.05" in a single day in September 2023, and the January 2016 blizzard buried the area under 30.3" of snow.
Merrick peaks in summer, with the warmest week of mid-to-late July averaging a high of 85° — humid and occasionally stormy, as the wettest week of the year falls right on its heels at the end of July. Winter bottoms out in mid-January with average highs of just 38°. Spring and fall offer the most comfortable conditions, with April through June and September through October delivering mild temperatures on either side of the summer heat.