Historical weather data, all-time temperature records, and monthly climate averages for Mamaroneck, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Mamaroneck runs mild but unpredictable — expect a high around 54° and a low near 37°, though history has thrown everything from 76° warmth (1967) to an 18° freeze (1954) at this date. There's nearly a coin-flip chance of rain at 44%, with a small but real 6% shot at snow.
Mamaroneck's weather has real range: an all-time high of 102° on July 4, 1966 sits at one extreme, while -10° on January 22, 1961 marks the other — a 112-degree spread over the record period. The wettest single day on record dumped 6.82 inches on April 15, 2007, and a 20-inch snowstorm on February 10, 1969 remains the benchmark for winter fury.
Summers are warm and humid, peaking in the July 16–22 window with average highs of 84°, while January is the deep freeze with average highs barely cracking 34°. Spring arrives quickly — highs jump from 47° in March to 59° in April — but that transition comes with the year's wettest stretch, making late March through April the soggiest time to visit.